GI, Liver & Pancreas Pathology
Shruti Tadachina; Sheela Devi Shivalingaiah; Mahesh Shetty
Abstract
Background & Objective: Colorectal carcinoma (CRC) is one of the most common cancers worldwide. The interaction of programmed cell death receptor 1 (PD-1) and programmed death ligand 1 (PD-L1) plays an important role by inhibiting the immune mechanism by which cancer cells escape antitumor immunity. ...
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Background & Objective: Colorectal carcinoma (CRC) is one of the most common cancers worldwide. The interaction of programmed cell death receptor 1 (PD-1) and programmed death ligand 1 (PD-L1) plays an important role by inhibiting the immune mechanism by which cancer cells escape antitumor immunity. Immunotherapy using checkpoint inhibitors is a growing treatment modality in many cancers; one such is anti-PD1/PD-L1. The present study aimed to study the immunohistochemical (IHC) expression of PD-L1 in CRC and evaluate the association of PD-L1 expression in CRC with various known clinicopathological parameters.Methods: It was a 2-year prospective study and included 34 colectomy specimens diagnosed as colorectal adenocarcinoma. The expression of PD-L1 was evaluated on tumor cells & tumor-infiltrating immune cells (TIICs) and correlated with various clinicopathological parameters.Results: Immunohistochemical expression of PD-L1 on tumor cells and tumor microenvironment in CRC revealed positivity in 17.65% of cases each. The PD-L1 expression on tumor cells was associated with lymphovascular invasion (LVI) and perineural invasion (PNI) with P- values of 0.012 and 0.005, respectively, while PD-L1 expression on TIICs was associated with tumor budding with P-value 0.022.Conclusion: IHC expression of PD-L1 on tumor cells and immune cells was associated with some known poor prognostic factors. Since anti-PD1/PD-L1 is used for targeted therapy, it may be beneficial and economically feasible to evaluate PD-L1 in CRC and establish its role as a prognostic factor.
GI, Liver & Pancreas Pathology
Mohammad Hossein Anbardar; Nadia Rahimizadeh
Abstract
Background & Objective: Colorectal cancer is the second reason for cancer-associated death. The prognosis of the malignancy is defined by TNM scoring. However, tumor grading, lymphovascular invasion, perineural invasion, and tumor buddings may affect its prognosis. This study aimed to assess the ...
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Background & Objective: Colorectal cancer is the second reason for cancer-associated death. The prognosis of the malignancy is defined by TNM scoring. However, tumor grading, lymphovascular invasion, perineural invasion, and tumor buddings may affect its prognosis. This study aimed to assess the prognostic and histologic impact of tumor budding in colorectal adenocarcinoma.Methods: This study is a retrospective cohort of 192 patients with colorectal adenocarcinoma. All four stages of colorectal adenocarcinoma patients were included, but the patients in stages I and II were also analyzed separately. We used pathology reports to extract the histopathologic data. The prognostic values were extracted by calling the patients.Results: Less than half of the patients were in stages I and II of the disease. According to our analysis, tumor extension and lymphovascular invasion were correlated with tumor budding count in patients in stages I and II, and lymphovascular invasion, tumor grade, tumor stage, lymph node involvement, tumor extension, tumor site, metastasis, and five-year survival were correlated with tumor budding within all stages.Conclusion: It is recommended that tumor budding count should be assessed and reported in pathology reports of adenocarcinomas due to its high correlation with poor prognosis.
GI, Liver & Pancreas Pathology
Dina Mohamed Allam; Hend Ahmed Kasem; Amira Hegazy; Shereen Fathy Mahmoud
Abstract
Background & Objective: Colorectal carcinoma (CRC) is the third leading cause of cancer-caused death worldwide and constitutes about 6.48% of all malignancies in Egypt. Studying the molecular profile of CRC is essential for developing targeted therapies. STAT3 and CTLA4 expression are among the molecular ...
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Background & Objective: Colorectal carcinoma (CRC) is the third leading cause of cancer-caused death worldwide and constitutes about 6.48% of all malignancies in Egypt. Studying the molecular profile of CRC is essential for developing targeted therapies. STAT3 and CTLA4 expression are among the molecular abnormalities claimed to cause CRC progression and chemo-resistance. Therefore, they could be used as potential therapeutic targets. This study aimed to evaluate pSTAT3 and CTLA4 expression levels and their possible roles as prognostic and predictive biomarkers in CRC using immunohistochemistry (IHC).Methods: This retrospective study included 113 CRC patients. Tissue microarrays were constructed, followed by pSTAT3 and CTLA4 antibodies immunostaining. Their expression was assessed and compared with clinicopathological parameters and survival data.Results: Both pSTAT3 and CTLA4 overexpression were significantly associated with poor prognostic parameters, such as the presence of distant metastasis (P=0.02 & 0.03), high grade (P<0.001 & 0.03), high mitotic count (P<0.001 & 0.03), high tumor budding group (P=0.008 & 0.04), infiltrating tumor border (P<0.001 & 0.007) respectively, and advanced pathological stage with pSTAT3 (P=0.02). A significant association was found between overexpression of both markers and short overall survival. Correlations between the H-score of pSTAT3 and CTLA4 in CRC showed a significant positive correlation (P<0.001).Conclusion: STAT3 and CTLA4 positivity have been linked to the development and progression of CRC, and they may provide potential prognostic indicators and therapeutic targets for CRC patients.
GI, Liver & Pancreas Pathology
Alireza Khooei; Sahar Seifnia; Amin Dalili; Hossein Bavandi; Saeid Dehghan Nezhad; Motahare Ebrahimnejad
Abstract
Malignant melanoma of the small intestine is mostly a metastatic tumor of other primary lesions, especially of skin origin. Primary malignant melanoma of the small intestine is very uncommon. The clinical presentation is usually nonspecific, thus leading to late diagnosis.We report a 42-year-old man ...
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Malignant melanoma of the small intestine is mostly a metastatic tumor of other primary lesions, especially of skin origin. Primary malignant melanoma of the small intestine is very uncommon. The clinical presentation is usually nonspecific, thus leading to late diagnosis.We report a 42-year-old man who presented to the emergency department of Imam-Reza Hospital with symptoms and signs of peritonitis and was a candidate for emergency laparotomy and enterectomy. The medical and family history were unremarkable. A bulky mass was seen, 190 cm away from the Treitz band, and a diagnosis of malignant melanoma was confirmed by histologic and immunohistochemical study. Further clinical examination revealed no primary tumor elsewhere, so the diagnosis of primary small intestinal melanoma was concluded.Although metastatic malignant melanoma in the GI tract is common, the primary one is a very rare entity. The diagnosis could be challenging because a thorough investigation is needed to rule out the possible initial origin.
GI, Liver & Pancreas Pathology
Parastoo Saniee; Paria Ghadersoltani; Masoumeh Noroozpour; Alireza Sadjadi
Abstract
Background & Objective: Formalin-fixed paraffin-embedded archived tissues are useful for the genetic analyses and assessment of some patients’ disease history, including infectious diseases. However, there is no established protocol for extracting bacterial DNA from the archived specimens. ...
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Background & Objective: Formalin-fixed paraffin-embedded archived tissues are useful for the genetic analyses and assessment of some patients’ disease history, including infectious diseases. However, there is no established protocol for extracting bacterial DNA from the archived specimens. In this study DNA was extracted from the archived H. pylori-positive gastric biopsies by some modifications applied to the previously published protocols. The quality of the extracted DNA was assessed by amplifying H. pylori-specific 16S rRNA gene.Methods: Fifty H. pylori-positive gastric biopsies obtained, fixed, and embedded in paraffin blocks during 2002-2008 were recruited. After paraffin removal, simultaneous proteinase K treatment and mechanical disruption using glass beads were used for the digestion of gastric tissues. DNA extraction was performed by adding one step of phenol treatment and two steps of incubation to the conventional phenol-chloroform method. The quantity and quality of the extracted DNA samples were assessed. Also, PCR was performed using primers specific for the H. pylori-specific 16S rRNA.Results: The electrophoresis showed that intact DNAs were recovered from all biopsy samples. Amplification of the PCR products with the size of 519bp confirmed the presence of H. pylori-specific 16S rRNA gene in all the biopsies.Conclusion: A 100% success rate for the amplification of H. pylori-specific 16S rRNA gene was achieved from all the samples. In this regard, the designed modified method resulted in the effective removal of interfering contaminations and enhanced the quality of the extracted bacterial DNA from the archived tissues. These modifications may contribute to better extraction of the intact DNA from different bacteria present in human tissues.
GI, Liver & Pancreas Pathology
Masoume Mahmoudi-Nesheli; Reza Alizadeh-Navaei; Laleh Vahedi; Omolbanin Amjadi; Tarang Taghvaei; Iradj Maleki; Ramin Shekarriz; Arash Kazemi; Versa Omrani-Nava; Maryam Alizadeh-Forutan
Abstract
Background & Objective: Leptin is an adipocyte-derived hormone with a critical role in energy balance. As demonstrated by previous investigations, leptin acts as a proliferative and angiogenic factor in cancer cells. However, results regarding its role in colorectal cancer are still inconclusive. ...
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Background & Objective: Leptin is an adipocyte-derived hormone with a critical role in energy balance. As demonstrated by previous investigations, leptin acts as a proliferative and angiogenic factor in cancer cells. However, results regarding its role in colorectal cancer are still inconclusive. We aimed to evaluate serum leptin and tissue expression of leptin receptor (Ob-R) in normal and malignant samples of colorectal.Methods: Serum and tissue samples from pathology-confirmed colorectal cancer patients and normal controls referring to a university hospital of Mazandaran were obtained during 2019-21. ELISA and immunohistochemistry were applied to determine leptin and Ob-R expression respectively.Results: A total of 90 samples belonging to 46 normal and 44 CRC patients were enrolled. Normal and CRC groups included 32 (69.56%) and 21 (47.72%) female subjects respectively. The average leptin concentration in the normal group was 115.80 and, in the patient, group was 124.47 ng/mL (P=0.897). CRC cases showed an insignificantly higher Ob-R detection rate (P=0.086).Conclusion: There was no significant difference in leptin and Ob-R expression between CRC patients and normal subjects. Thus, leptin and its receptor may not be useful as a biomarker of CRC.
GI, Liver & Pancreas Pathology
Seyed Amir Miratashi Yazdi; Elham Nazar
Abstract
Background & Objective: Lymphovascular tumoral invasion is a typical histopathological feature of gastric carcinomas and supports the recognition of high-risk patients for the recurrence. We aimed to study the CD31 expression in diverse subtypes of gastric carcinomas and to show its association with ...
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Background & Objective: Lymphovascular tumoral invasion is a typical histopathological feature of gastric carcinomas and supports the recognition of high-risk patients for the recurrence. We aimed to study the CD31 expression in diverse subtypes of gastric carcinomas and to show its association with the histopathologic findings of the carcinoma to assess the prognosis.Methods: This cross-sectional study was conducted on 40 established patients of gastric adenocarcinoma from radical gastrectomy. The patients were classified according to the pathology assessments. Tumoral tissues were assessed by immunohistochemical staining for the CD31 expression. Malignant behavior was estimated by the histopathological evaluations.Results: CD31 positivity was described in 23 (57.5%) of all evaluated patients. The assessment of CD31 expression and tumor features presented no significant association between the CD31 expression and patients’ age, sex, tumor site, size, grade and stage, subtypes of carcinoma, perineural invasion, and also lymphovascular invasion (P>0.05).Conclusion: Lymphovascular invasion makes valuable additional evidence that might be useful to detect gastric carcinoma patients at high risk for the recurrence, who could be candidates for more supplementary therapies. However, in our society, the CD31 expression did not show any association with the aggressive histopathologic features of this tumor.
GI, Liver & Pancreas Pathology
Geetha V PATIL Oklay; Akina Prakash; Akshatha C; Ashwini Nargund; Libin Babu Cherian; Balu S; Arun Kumar A R
Abstract
Background & Objective: Hepatoblastoma encompasses 1% of pediatric malignancies and is the most common liver malignancy in children. Ninety percent of cases are under 5 years of age. Clinical and pathological risk stratification forms a crucial role in determining the treatment strategy. This study ...
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Background & Objective: Hepatoblastoma encompasses 1% of pediatric malignancies and is the most common liver malignancy in children. Ninety percent of cases are under 5 years of age. Clinical and pathological risk stratification forms a crucial role in determining the treatment strategy. This study aimed to assess the clinicopathological profile of hepatoblastoma with risk stratification and follow-up in children.Methods: A retrospective evaluation was performed on all pediatric patients recognized with hepatoblastoma between 2016 and 2020 in our institution. Clinical, radiological, biochemical, pathological, and treatment data were analyzed. Cases were stratified based on the SIOPEL protocol and compared with the outcome.Results: The median age of all children was 1 year, the male-to-female ratio was 2.3:1, and elevated α-fetoprotein (AFP) was observed in all cases. SIOPEL risk stratification showed that 50% of children are at high risk. The histopathological types were fetal (30%), embryonal (20%), and macrotrabecular (5%) patterns under epithelial type and mixed epithelial and mesenchymal type (45%) with 1 case showing teratoid features. During the follow-up period, of the 7 children who died, 6 belonged to the high-risk SIOPEL category, and 5 had a mixed epithelial and mesenchymal pattern.Conclusion: Our study found a significant correlation between clinicopathological data, histopathological patterns, and outcomes. Accordingly, histopathological patterns could be considered one of the criteria for risk stratification. Histopathological risk stratification indicators (such as SIOPEL and PRETEXT) have strong prognostic and predictive outcomes; hence, our study emphasizes such parameters to aid oncologists.
GI, Liver & Pancreas Pathology
Samaneh Salarvand; Farzaneh Bagheri; Mahsa Gholizadeh; Sima Sharifi; Pooneh Panahi; Ebrahim Esmati; Marzieh Lashkari; Amirmohsen Jalaeefar; Mohammad Shirkhoda; Reza Shahsiah; Reza Ghalehtaki
Abstract
Background & Objective: Iran is located in the esophageal cancer geographical belt. As multiple genetic alterations are responsible for the molecular pathogenesis of esophageal squamous cell cancer (ESCC), the role and frequency of HER2 expression, MMR deficiency, and PI3KCA mutation are not well ...
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Background & Objective: Iran is located in the esophageal cancer geographical belt. As multiple genetic alterations are responsible for the molecular pathogenesis of esophageal squamous cell cancer (ESCC), the role and frequency of HER2 expression, MMR deficiency, and PI3KCA mutation are not well defined.Methods: We carried out HER2/neu expression, dMMR/MSI high, and PI3KCA mutation analysis in specimens of patients with ESCC. We accessed archival tissue blocks related to specimens of 68 ESCC cases at the time of surgery following neoadjuvant chemoradiation. These patients underwent surgery during 2013-2018 at the Cancer Institute of Iran affiliated with the Tehran University of Medical Sciences in Tehran.Results: None of the patients showed HER2 expression, dMMR/MSI high, or PI3K mutations.Conclusion: dMMR/MSI-H and PI3KCA mutation and HER2 expression may not be reliable andfrequent targets for systemic therapy in patients with esophageal SCC.
GI, Liver & Pancreas Pathology
Pummi kumari; Ruchi Sinha; Nisha Khanna; Tanmoy Maji
Abstract
Xanthomas are characterized by the presence of foamy lipid-laden macrophages. The gastrointestinal tract is an uncommon site for xanthoma, with the stomach being the most favored location. They have been associated with various premalignant and malignant conditions of the stomach. We present a case of ...
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Xanthomas are characterized by the presence of foamy lipid-laden macrophages. The gastrointestinal tract is an uncommon site for xanthoma, with the stomach being the most favored location. They have been associated with various premalignant and malignant conditions of the stomach. We present a case of a 21-year-old female patient with dyspepsia of 4 months duration. Her lipid profile was mildly altered. On upper gastrointestinal endoscopy, multiple discrete yellow patches were found in the antrum, diagnosed as gastric xanthoma on microscopy. Various published literature has emphasized the frequent association of gastric xanthomas with gastritis, gastric atrophy, intestinal metaplasia, and gastric cancer. Hence, there is a necessity for early recognition, treatment of any coexistent pathology, and close clinical follow-up.
GI, Liver & Pancreas Pathology
Afshin Moradi; Ali Mokhtar pour; Amir Yazdani; Kianoosh Kianersi; Leila Bahari Khasraghi
Abstract
The ileum undergoes endoscopic biopsy much more than before. Most of these biopsies are either completely normal or show non-specific changes. Nevertheless, in some diseases, ileal biopsy is diagnostic, and in some cases it may be the only anatomical location of the disease. Endoscopically normal mucosal ...
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The ileum undergoes endoscopic biopsy much more than before. Most of these biopsies are either completely normal or show non-specific changes. Nevertheless, in some diseases, ileal biopsy is diagnostic, and in some cases it may be the only anatomical location of the disease. Endoscopically normal mucosal biopsy is unlikely to provide useful diagnostic information and is not routinely recommended. However, in the presence of ileitis, ulcers, or erosions, biopsies can be very helpful. Ileitis might be induced by various conditions including infectious diseases, vasculitis, medication-induced, ischemia, eosinophilic enteritis, tumors etc. The conclusive cause of the condition is proposed by a comprehensive clinical background and physical examination, laboratory investigations, ileocolonoscopy, and imaging findings. Ileoscopy and biopsy are mainly useful in correctly selected cases such as patients that present with inflammatory diarrhea and endoscopic lesions. This review is meant to provide a simple algorithmic approach to the ileal biopsy samples. There are several boxes that give diagnostic clues and an idea behind the categories of ileal disorders.This review is based on the reviewed literature and the authors' experiences. We have summarized different histological patterns in the ileal biopsy specimens that can be used in the diagnosis of inflammatory disorders of the ileum.This review provides an algorithmic approach to the clinicopathological features of inflammatory disorders of the ileum with a brief discussion of some important related issues.
GI, Liver & Pancreas Pathology
Zahra Modabber; Roghayeh Pourkia; Hamidreza Vafaey; Ali Alizadeh; Mohammad Ranaei
Abstract
It is very rare for colorectal neoplasms to metastasize to the heart in the worldwide medical literature; only a single case of well-documented colorectal cancer metastasis to the left atrium was found. The case of a 66-year-old man is explained in this paper, who was suffering from metastatic adenocarcinoma ...
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It is very rare for colorectal neoplasms to metastasize to the heart in the worldwide medical literature; only a single case of well-documented colorectal cancer metastasis to the left atrium was found. The case of a 66-year-old man is explained in this paper, who was suffering from metastatic adenocarcinoma of the colon that included the left atrium. In transthoracic and transesophageal echocardiography, a large multilobulated mass was present in the left atrium. An accidental pulmonary mass was also seen in a lung spiral CT scan. The cardiac mass was taken out, and a biopsy was obtained from the pulmonary mass. Adenocarcinoma was seen in histological assessment. Immunohistochemical staining was carried out to examine the expression of cytokeratin 7, cytokeratin 20, and caudal-related homeobox transcription factor 2 (CDX2) to determine the origin of the adenocarcinoma. In addition, the expression of these proteins was linked to the attributes of the patient and tumor. Post-surgery transesophageal echocardiography showed normal left ventricle and right ventricle function with no evidence of left atrium mass. Therefore, we suggest that asymptomatic cancer patients with a history of colorectal cancer and who have developed cardiac symptoms should be immediately examined for potential cardiac metastasis.
GI, Liver & Pancreas Pathology
Avan Sardar Ahmed; Jalal Ali Jalal; Kalthuma Salih Hamad Ameen
Abstract
Background & Objective: Gastric cancer (GC) persists to be a major health issue globally, and the need to investigate new molecular markers for improving the survival of patients continues. CDX2 is a homeobox caudal protein family member encoded by the CDX2 gene and is probably playing a role in ...
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Background & Objective: Gastric cancer (GC) persists to be a major health issue globally, and the need to investigate new molecular markers for improving the survival of patients continues. CDX2 is a homeobox caudal protein family member encoded by the CDX2 gene and is probably playing a role in intestinal epithelial differentiation and proliferation. This study aimed to assess the expression of this protein in gastric cancer cells in addition to its correlation with multiple clinicopathological parameters.Methods: This observational retrospective study was carried out on 80 gastric cancer cases in Erbil, Iraq. CDX2 protein immunoexpression in tumor cells, as well as its correlation with several clinicopathological criteria, were investigated.Results: CDX2 was detected in 38.75% of GC patients. We found a significant correlation between CDX2 expression and the age of patients (P=0.02). Even though the protein was more expressed in tumors with negative lymphovascular invasion and intestinal GC, there was no significant correlation between the expression of this protein and invasion. In addition, CDX2 expression was not significantly correlated with patient gender, tumor grade, nodal status, and tumor stage.Conclusion: CDX2 expression was observed to be downregulated in younger patients. It could be due to the higher frequency of diffuse GC, in which CDX2 is expressed less than the intestinal type, in younger individuals.
GI, Liver & Pancreas Pathology
Zohreh Mirzapour Abbas abadi; Fatemeh Samiee Rad; Dariush Hamedi Asl; Babak Rahmani; Mahmood Soleimani Dodaran; Amir Peimani
Abstract
Background & Objective: Phosphatase and tensin homolog (PTEN) is a tumor suppressor gene located at chromosome 10. PTEN is a regulator of the PI3K/AKT signaling pathway that inhibits cell proliferation and promotes apoptosis. PTEN loss of function occurs in a spectrum of cancers, including ...
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Background & Objective: Phosphatase and tensin homolog (PTEN) is a tumor suppressor gene located at chromosome 10. PTEN is a regulator of the PI3K/AKT signaling pathway that inhibits cell proliferation and promotes apoptosis. PTEN loss of function occurs in a spectrum of cancers, including colorectal adenocarcinoma. This study aimed to investigate the probable correlation of negative PTEN expression with clinicopathological features and colorectal adenocarcinoma (CRC) patients'''' survival.Methods: In this cross-sectional study using Immunohistochemistry stainingPTEN expression status on 151 CRC tissues was evaluated. Then the results of IHC staining was compared to those of clinicopathological features. The relationship between PTEN and KRAS mutation status was also investigated.Results: Of 151 CRC samples, 89 (58.9%) were negative for PTEN expression. Loss of PTEN expression was associated with KRAS mutation (P
GI, Liver & Pancreas Pathology
Behrang Kazeminezhad; Helia Falahatian Mehrjardi; Afshin Moradi; Tahmineh Mollasharifi
Abstract
Background & Objective: The existence of eosinophils in the gastric mucosal epithelium is unusual, while the term "eosinophilic gastritis" has become overused due to the increased numbers of eosinophils found in gastric specimens. Thus, we aimed to assess the number and distribution of eosinophils ...
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Background & Objective: The existence of eosinophils in the gastric mucosal epithelium is unusual, while the term "eosinophilic gastritis" has become overused due to the increased numbers of eosinophils found in gastric specimens. Thus, we aimed to assess the number and distribution of eosinophils in gastric specimens in Shahid Beheshti University of Medical Sciences hospitals.Methods: This study was performed on 318 patients with gastric diseases who had undergone endoscopic biopsy or gastrectomy in the hospitals affiliated with Shahid Beheshti University from 2016 to 2018. By referring to the archives of pathology departments, patients' demographic and clinical information, endoscopic and histopathological findings were collected. The data was then statistically analyzed using SPSS software version 24 with a significance level of P-value< 0.05 in all tests.Results: The participants were 157 men and 161 women, with an average age of 51.21 years. There was no significant correlation between eosinophil distribution and age, gender, or primary gastric locations. However, there was a strong correlation between the count of eosinophils in the lamina propria and intestinal metaplasia. Mean eosinophil count per high power field (HPF) was 12, 23, and 14 in mild, moderate, and severe degrees of intestinal metaplasia, respectively. An increase in eosinophil count was seen along with lymphoplasma cells infiltration up to 8/HPF in mild cases, 13/HPF in moderate cases, and 14/HPF in severe cases.Conclusion: Eosinophil counts in the lamina propria layer show a significant positive relationship with the eosinophil sheet, presence of Heliobacter pylori microorganism, intestinal metaplasia, and lymphoplasma cells infiltration.
GI, Liver & Pancreas Pathology
Hala M. El-hanbuli; Rehab S. Galal; Mohammed F. Darweesh; Mohamed H. Elmahdi
Abstract
Background & Objective: Colorectal cancer is the third most common cause of cancer death worldwide. Stanniocalcin 2 (STC2) is a glycoprotein hormone over-expressed in many human cancers where it regulates tumor progression and invasion. Evaluating its expression in colorectal cancer and its relation ...
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Background & Objective: Colorectal cancer is the third most common cause of cancer death worldwide. Stanniocalcin 2 (STC2) is a glycoprotein hormone over-expressed in many human cancers where it regulates tumor progression and invasion. Evaluating its expression in colorectal cancer and its relation with different clinicopathological parameters can provide valuable information about its role in colorectal cancer progression and behavior.Methods: This retrospective study was conducted on tissue samples of colorectal cancer. The STC2 immunohistochemical expression was detected and evaluated in 60 cases of colorectal cancer tissue samples of formalin-fixed and paraffin-embedded blocks. Then statistical analysis was performed to assess the relationship between its expression level and several clinicopathological parameters in the studied cases.Results: Statistically significant associations were found between the high level of STC2 immunohistochemical expression and histological tumor grade (P<0.001), tumor depth of invasion (T stage) (P=0.004), lymph node metastasis (N stage) (P=0.001), tumor Dukes’ stage (P<0.001), the presence of lymphovascular invasion (P<0.001), and perineural invasion (P<0.001).Conclusion: STC2 over-expression in colorectal cancer may be associated with more aggressive tumor behavior including increased tumor invasion, higher histological grade, higher rate of nodal metastasis and increased incidence of lymphovascular and perineural invasions. These data suggest a potential role for STC2 as a predictive biomarker for tumor behavior in colorectal cancer patients.
GI, Liver & Pancreas Pathology
Mohammad Reza Abbaszadegan; Negin Taghehchian; Azadeh Aarabi; Sohrab Nozari; Ehsan Saburi; Meysam Moghbeli
Abstract
Background & Objective: Gastric cancer (GC) is considered one of the main reasons for cancer-related mortalities among Iranians. Kindlin-1 is an adhesion protein member of integrin-interacting proteins, regulating integrin activation through direct interaction with β-integrin. Therefore, kindlin-1 ...
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Background & Objective: Gastric cancer (GC) is considered one of the main reasons for cancer-related mortalities among Iranians. Kindlin-1 is an adhesion protein member of integrin-interacting proteins, regulating integrin activation through direct interaction with β-integrin. Therefore, kindlin-1 can be involved in the regulation of cell proliferation and adhesion. In the present study, we assessed the possible role of kindlin-1 in GC progression and metastasis.Methods: KINDLIN1 messenger RNA (mRNA) expression was assessed in tumor tissues from 80 GC patients in comparison with normal tissues using real-time polymerase chain reaction (PCR).Results: The levels of KINDLIN1 expressions were significantly correlated with sex (P=0.05) and tumor location (P=0.002). KINDLIN1 expression was also significantly associated with lymph node metastasis among the helicobacter pylori (HP)-negative cases (P=0.001). Moreover, a significant association between age and KINDLIN1 expression was observed among the HP-positive cases (P=0.039).Conclusion: In the present study, we introduced KINDLIN1 as a location-specific marker for cardia gastric carcinoma. Moreover, it was observed that KINDLIN1 could be used as a sex-dependent diagnostic marker of GC patients.
GI, Liver & Pancreas Pathology
Amin Jafari Oliayi; Shahriar dabiri; Malek Hossein Asadi
Abstract
Background & Objective: Colorectal cancer (CRC), like other cancers, needs faster and more accurate identifications. A well-timed prognosis of CRC could be an important turning point in the survival of patients. Supplementary signs, such as long non-coding RNAs (lncRNAs), could be helpful for this ...
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Background & Objective: Colorectal cancer (CRC), like other cancers, needs faster and more accurate identifications. A well-timed prognosis of CRC could be an important turning point in the survival of patients. Supplementary signs, such as long non-coding RNAs (lncRNAs), could be helpful for this purpose. A new possible biomarker for CRC identification is introduced by this study.Methods: RNA extraction was performed by the RNX-Plus solution for 64 tumor and non-tumor tissues. Complementary DNAs (cDNAs) were synthesized, and quantitative real-time PCR was performed for relative expression level measurement and the data was analyzed statistically using the Prism 6 software. For Small nucleolar host gene 6 knockdown, siRNA was designed based on Reynolds rules. The cells were cultured in their appropriate media, and the siRNA-lipofectamine complex was formed. The transfection complex was presented for sw48, sw480, and sw1116 as CRC cells with different grades. After transfection, the SNHG6/β actin ratio was determined. Then, the distribution of siRNA-treated cells was determined by the Partec flow cytometer instrument and analyzed by the FloMax software.Results: SNHG6 was more expressed in CRC tumors than non-tumor tissues. In tumor tissues, SNHG6 upregulation and tumors’ grade progression were concurrent. SNHG6 was upregulated in cases with lymphovascular invasion than in cases with perineural invasion. The knockdown of SNHG6 conduced to G1 arrest in CRC cells, more noticeably in high-grade ones.Conclusion: SNHG6 could be applied as a consideration to differentiate tumor and non-tumor tissues and grade definition in colorectal malignancies, and it could participate in colorectal tumor formation as a cell cycle progressive factor.
GI, Liver & Pancreas Pathology
Bita Geramizadeh; Mahsa Sehat; Azam Mehrmozayan; Alireza Shojazadeh
Abstract
Background & Objective: Differential diagnosis between cholangiocarcinoma (CCA) and metastatic pancreatic ductal adenocarcinoma (PDA) in the liver is difficult and so far, no specific immunohistochemical marker is reported to differentiate these two tumors. Considering the existing literature, the ...
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Background & Objective: Differential diagnosis between cholangiocarcinoma (CCA) and metastatic pancreatic ductal adenocarcinoma (PDA) in the liver is difficult and so far, no specific immunohistochemical marker is reported to differentiate these two tumors. Considering the existing literature, the level of expression of Annexins (Annexin A1, 10 and 13) have been studied for differential diagnosis between these two tumors by molecular methods and promising results have been reported. Therefore, in this study, we tried to investigate the immunohistochemical value of these three Annexins for the differential diagnosis of CCA and PDA in the liver.Methods: The articles that reported the research subject in 10 years (2009-2019), including 45 cases of CCA and 50 cases of metastatic PDA in the liver were evaluated considering the presence or absence of AnnexinA1 (ANXA1), Annexin A10 (ANXA10) and Annexin A13 (ANXA13) expression by immunohistochemistry, were investigated.Results & Conclusion: This study showed, ANXA1 was positive both in PDA and CCA, ANXA10 was positive in ~60% of PDA cases and ~40% of CCA cases, and ANXA13 was mostly negative in both groups. The best sensitivity was found in cytoplasmic and nuclear ANXA1 (80% and 84%, respectively) to distinguish PDA from CCA and vice versa. The best specificity was observed in ANXA10 and ANXA13 to distinguish PDA from CCA. Also, ANXA13 had the best specificity to distinguish CCA from PDA. Our investigations showed that, ANXA1 probably can classify positive cases correctly, but it cannot discriminate PDA from CCA. ANXA10 had fair sensitivity and specificity to discriminate PDA from CCA. ANXA13 apparently had a high specificity that can help to narrow-down the differential diagnoses.
GI, Liver & Pancreas Pathology
Ali Yaghobi Joybari; Behnaz Behzadi; Payam Azadeh; Sam Alahyari
Abstract
Background & Objective: Currently, neoadjuvant chemoradiotherapy, followed by surgery, is the standard treatment for locally advanced rectal cancer. The use of induction chemotherapy for this tumor is controversial. In this study, the benefits and side effects of induction chemotherapy in locally ...
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Background & Objective: Currently, neoadjuvant chemoradiotherapy, followed by surgery, is the standard treatment for locally advanced rectal cancer. The use of induction chemotherapy for this tumor is controversial. In this study, the benefits and side effects of induction chemotherapy in locally advanced rectal cancer are evaluated.Methods: Twenty-nine patients with locally advanced rectal cancer in 2018-2019 were enrolled in this study. Initially, they underwent induction chemotherapy (oxaliplatin 130 mg/m2 every 3 weeks and capecitabine 1000 mg/m2 twice a day for 14 days every 3 weeks for 2 courses). Then, neoadjuvant chemoradiotherapy (radiotherapy 50.4 Gy/28 for 5 days a week concomitant with weekly oxaliplatin 50 mg/m2, as well as capecitabine 825 mg/m2/bid on the days of radiotherapy) was administered. After 4 weeks, computed tomography (CT) scan of thorax, pelvis, and abdomen with and without contrast was performed. Total mesorectal surgery was performed 6-8 weeks after the end of radiotherapy. Four courses of adjuvant chemotherapy were applied. Pathologic complete response (pCR), margin, sphincter preservation, and adverse effects were assessed.Results: In this study, pCR was present in 6 (20.7%) patients. R0 resection was done in 96.05%. Sphincter was preserved in 44.4% of lower rectal tumors. Two patients (6.9%) did not complete adjuvant treatment. Grade 3 adverse effects were documented in 13.7% of cases during induction chemotherapy and 17.2% of cases during neoadjuvant chemoradiation. Mortality was not reported.Conclusion: Induction chemotherapy, followed by neoadjuvant chemoradiotherapy and surgery, would be an effective and safe modality in locally advanced rectal cancer.
GI, Liver & Pancreas Pathology
Bita Geramizadeh; Farzaneh Bozorg-Ghalati; Firoozeh Jafari; Mitra Mirzai; Zahra Jowkar
Abstract
Background & Objective: Microsatellite instability is common in familial colorectal cancers. It can be tested by the molecular and immunohistochemical methods. There are very few studies which address comparing the clinicopathological characteristics of microsatellite stable (MSS) and microsatellite ...
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Background & Objective: Microsatellite instability is common in familial colorectal cancers. It can be tested by the molecular and immunohistochemical methods. There are very few studies which address comparing the clinicopathological characteristics of microsatellite stable (MSS) and microsatellite unstable (MSI) colorectal cancers from Iran. n this study, we aimed to evaluate the clinicopathological and immunohistochemical findings of MSS and MSI colorectal cancers in our Center as the largest Center of gastrointestinal surgery and oncology in the South of Iran. We also compared the immunohistochemical method vs. molecular study using DNA sequencing.Methods: For 5 years (2015-2019), 34 patients who underwent operation in the affiliated Hospitals of Shiraz University of Medical Sciences were clinically suspected to microsatellite instability (MSI). The molecular diagnostic tests with DNA sequencing were performed. Clinicopathological and immunohistochemical findings of MSI colorectal cancers were compared with those who were stable. Results: In the South of Iran, MSI colorectal cancers were more common in males. These tumors were more common in the right side with more tendencies to produce mucin with lymphocytic infiltration. Conclusion: It was concluded that immunohistochemistry is a specific method for the diagnosis of MSI colorectal cancers, but false negative rate is high, and sensitivity is low. Therefore, we recommend performing molecular studies by DNA sequencing in colon cancer with clinical suspicion to MSI and negative immunohistochemistry
GI, Liver & Pancreas Pathology
Mohammad Shafiei; Mahdi Alemrajabi; Ali Najafi; Amirhomayoon Keihan; Masoudreza Sohrabi
Abstract
Background and Objective: Colorectal Cancer (CRC) is the third most common cancer after prostate (breast in women) and lung cancer; it is also the third cause of cancer deaths reported in both men and women in 2020. Currently, the most commonly used diagnostic tools for CRC are colonoscopy, serological ...
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Background and Objective: Colorectal Cancer (CRC) is the third most common cancer after prostate (breast in women) and lung cancer; it is also the third cause of cancer deaths reported in both men and women in 2020. Currently, the most commonly used diagnostic tools for CRC are colonoscopy, serological methods, and other imaging techniques. Despite the benefits and abilities of these methods, each of them has disadvantages that reduce its functionality and acceptance. The aim of this study was identifying specific and non-invasive genetic biomarkers to diagnose colorectal cancer. Methods & Material: In this study, changes in the expression of HLTF and SEPT9 genes were evaluated by Real Time PCR in blood and tissue samples of CRC patients. A total of 100 samples (50 Blood and 50 Tissue samples) were evaluated with a definite diagnosis of CRC in Firoozgar Hspital, Tehran, Iran, in 2018. The QPCR method was used to compare the expression of candidate genes between the patients group and control group in both samples. Sensitivity and specificity of the test were examined using ROC curve analysis. Results: The results showed a significant down-regulation in the expression of both selected genes in tissue and peripheral blood in the various stages of the CRC. The sensitivity and specifity of both genes was about 80%. Conclusion: The findings showed that the two candidate genes can be suggested as specific biomarkers for diagnosis of CRC using the peripheral blood as a non-invasive method. For a definite conclusion, more research is needed.
GI, Liver & Pancreas Pathology
maryam Rezaee; Elmira Gheytanchi; Zahra Madjd; Mitra Mehrazma
Abstract
Background & Objective: Colorectal cancer (CRC) is the third most common cancer worldwide with a high mortality rate. The main causes of death in patients are recurrence and metastasis which are mainly attributed to the small subpopulation of cells within tumors called cancer stem cells (CSCs). This ...
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Background & Objective: Colorectal cancer (CRC) is the third most common cancer worldwide with a high mortality rate. The main causes of death in patients are recurrence and metastasis which are mainly attributed to the small subpopulation of cells within tumors called cancer stem cells (CSCs). This study aimed to evaluate the correlation between the expression of AHDL1 and CD133 as CSC associated markers and clinicopathological characteristics in CRC.Methods: In this cross-sectional study, a total of 483 CRC tumor samples were immunohistochemically stained for detection of CD133 and ALDH1 markers. Correlations of marker expression with clinicopathological factors were also evaluated.Results: There was a significant correlation between the luminal intensity of CD133 and neural invasion (p =0.05) and between the cytoplasmic intensity of CD133 and metastasis (p =0.05). In terms of H-score, a positive significant relation was observed between cytoplasmic expression of CD133 and lymph node (p =0.02), neural (p =0.04) and vascular invasion (p =0.02). The ALDH1 cytoplasmic expression showed a significant correlation with tumor size (p =0.001).Conclusion: Our findings showed that increased expression of CD133 and ALDH1 is associated with tumor progression and worse outcomes in CRC patients. These markers can be good candidates for localized targeting of CSCs using antibodies. Future researches need to be improved approaches for early detection of CRC, and treatment monitoring for CRC and other cancers.
GI, Liver & Pancreas Pathology
Apurv Ghosh; M Nirupama; Nandan Padmanabha; Hema Kini
Abstract
Background & Objective: Cervical cancer is the most common cancer in women worldwide with high mortality, necessitating quicker diagnostic methods. We wish to enhance the existing cervical biopsies of Squamous Intraepithelial Lesions (SIL) using p16 and Ki67 as surrogate markers to assess correlation ...
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Background & Objective: Cervical cancer is the most common cancer in women worldwide with high mortality, necessitating quicker diagnostic methods. We wish to enhance the existing cervical biopsies of Squamous Intraepithelial Lesions (SIL) using p16 and Ki67 as surrogate markers to assess correlation between its positivity and histological grade of the lesion. Methods: Analysis of p16 and Ki67 expression was done on 31 histopathologically diagnosed cases of SILs. Positive expression of p16 was assessed based on a scoring system and compared with histology and cytology. Ki67 expression was studied and the correlation was observed with degree of dysplasia. Twenty cases of chronic cervicitis was assigned to the control group for comparison. Result: Cases of HSIL showed greater expression of p16 as compared to LSIL. Sensitivity of p16 for HSIL was higher than that for LSIL. The specificity for HSIL and LSIL was 100%. Ki67 expression correlated well with the degree and level of dysplasia with a significant P-value of 0.002. Conclusion: p16 and Ki67 positivity of SILs should point towards further evaluation. The expressions of p16 and Ki67 are useful markers for confirmation of SILs and in predicting HPV infection which can be further confirmed by HPV DNA testing.
GI, Liver & Pancreas Pathology
Dorsay Sadeghian; Farid Azmoudeh-Ardalan; Simin Dashti-Khavidaki; Nasir Fakhar
Abstract
The occurrence of hepatotoxicity following etanercept (tumor necrosis factor-alpha antagonist) prescription, has been studied well. However, an acute hepatic failure leading to liver transplant as an adverse effect of this drug has not been reported in the literature. In this article, we are going to ...
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The occurrence of hepatotoxicity following etanercept (tumor necrosis factor-alpha antagonist) prescription, has been studied well. However, an acute hepatic failure leading to liver transplant as an adverse effect of this drug has not been reported in the literature. In this article, we are going to present a case of acute liver failure followed by liver transplantation, in a 32 years old man with a previous history of ankylosing spondylitis after etanercept administration. On pathologic examination of the explanted liver, extensive confluent necrosis in all liver segments, as well as prominent infiltration of a mixed population of inflammatory cells in portal tracts, were noted. This study urges the importance of close follow-up of patients receiving etanercept regarding liver complications. Further studies are required to assess the prevalence, risk factors, and outcome of these cases.