Abstract:
Background: Carcinoma of the colon and rectum is one of the commonest causes of cancer-related deaths globally. In
India, the incidence of carcinoma of the colon and rectum is high due to genetic factors, lifestyle, and environmental
factors. Over 50% of cases are diagnosed in the late stage, which leads to limitations in treatment and worsens
prognosis. Biomarkers such as Carcinoembryonic Antigen and Mucin-1 (MUC1) play a crucial role as prognostic
markers in Colorectal Carcinoma (CRC). Aim and Objectives: To evaluate and correlate MUC1 expression with the
grading and staging of CRC. Material and Methods: A hospital-based cross-sectional study was done on 40
specimens received in the histopathology section of the department of pathology. Tumor tissue blocks on which
diagnosis of CRC was made were evaluated for MUC1 expression and were correlated with grading and staging of
CRC. Results: MUC1 expression showed score 3+ positivity in 70% cases of moderately differentiated
adenocarcinoma, 50% cases of well-differentiated adenocarcinoma and in all cases of poorly differentiated
adenocarcinoma. In 78.57% of T3 cases and 75% of T4 cases, score 3 MUC1 expression was observed. Score 3+
MUC1 expression was noted in 60% of N0, 82% of N1 and 100% of N2. The maximum number of cases showing the
depth of invasion in the subserosa showed the highest score, that is, score 3, amounting to 85.71%. Conclusion:
Overexpression of MUC1 is associated with the aggressiveness and progression of the tumor, and it can aid
clinicians in intensifying chemotherapy in cases of CRC with high MUC1 expression.
