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Clinicopathological Factors Affecting Mucin 1, Mucin 2, and Mucin 5AC Staining in Patients who Underwent Resection for Colorectal Cancer.
OBJECTIVE: To investigate the clinicopathological factors affecting mucins (MUC 1, MUC 2, and MUC 5AC) staining in patients who underwent resection for colorectal cancer.
STUDY DESIGN: An observational study. Place and Duration of the Study: Department of General Surgery and Department of Pathology, Kafkas University Faculty of Medicine, Kars, Turkey, between January 2020 and January 2021.
METHODOLOGY: Patients operated on for colorectal adenocarcinoma were included in the study. Patients who underwent colorectal surgery for benign diseases or had a pathological diagnosis other than adenocarcinoma were excluded from the study. Clinicopathological factors affecting MUC1, MUC2, and MUC5AC staining were evaluated with appropriate statistical tests, assuming a significant p-value of less than 0.05.
RESULTS: Of the 30 patients who met all study criteria, 18 (60%) were males. The mean age of all patients was 62.83±16.79 (21-88). MUC1 strongly positive staining was observed in 18 (60%) cases, and high expression was detected in pT4 and pT3 cases (p=0.005). In addition, increased expression was also noted in cases with lymph node involvement (p=0.045). MUC2 expression was more than 60% (strongly positive) in 20 (66.7%). The MUC2 expression was increased in moderately differentiated cases (p=0.032). There was no staining (negativity) in 22 (73.3%) cases with MUC5AC, and more than 60% staining (strongly positive) was observed in 3 (10%) cases. In addition, strong expression was noted in rectosigmoid tumours (p=0.001), female patients (p=0.046), and patients with pT3 and pT4 tumours (p=0.05).
CONCLUSION: High MUC1 and high MUC5AC staining were observed in advanced colorectal cancer, whereas high MUC2 staining was observed in patients with moderate tumour differentiation.
KEY WORDS: Colorectal cancers, Gene expressions, Mucin.
STUDY DESIGN: An observational study. Place and Duration of the Study: Department of General Surgery and Department of Pathology, Kafkas University Faculty of Medicine, Kars, Turkey, between January 2020 and January 2021.
METHODOLOGY: Patients operated on for colorectal adenocarcinoma were included in the study. Patients who underwent colorectal surgery for benign diseases or had a pathological diagnosis other than adenocarcinoma were excluded from the study. Clinicopathological factors affecting MUC1, MUC2, and MUC5AC staining were evaluated with appropriate statistical tests, assuming a significant p-value of less than 0.05.
RESULTS: Of the 30 patients who met all study criteria, 18 (60%) were males. The mean age of all patients was 62.83±16.79 (21-88). MUC1 strongly positive staining was observed in 18 (60%) cases, and high expression was detected in pT4 and pT3 cases (p=0.005). In addition, increased expression was also noted in cases with lymph node involvement (p=0.045). MUC2 expression was more than 60% (strongly positive) in 20 (66.7%). The MUC2 expression was increased in moderately differentiated cases (p=0.032). There was no staining (negativity) in 22 (73.3%) cases with MUC5AC, and more than 60% staining (strongly positive) was observed in 3 (10%) cases. In addition, strong expression was noted in rectosigmoid tumours (p=0.001), female patients (p=0.046), and patients with pT3 and pT4 tumours (p=0.05).
CONCLUSION: High MUC1 and high MUC5AC staining were observed in advanced colorectal cancer, whereas high MUC2 staining was observed in patients with moderate tumour differentiation.
KEY WORDS: Colorectal cancers, Gene expressions, Mucin.
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