Journal of Histopathology and Cytopathology
January 2024 Volume 8 Issue 1
Original Contribution
Evaluation of Immunohistochemical Expression of p53 in Colorectal Carcinoma
1. *Dr. Mahfuza Jebun Mouri; Lecturer, Department of Pathology, Shaheed Suhrawardy Medical College, Sher-E-Bangla Nagar, Dhaka. mouri@gmail.com.
2. Professor Dr. Enamul Kabir, Professor, Department of Pathology, Popular Medical College, Dhaka.
3. Professor Dr. Shahnaj Begum, Professor, Department of Pathology, Sir Salimullah Medical College, Dhaka.
*For correspondence
Abstract
Background: The most common gastrointestinal malignancy is colorectal carcinoma and is a major cause of morbidity and mortality. In colorectal carcinoma the most frequently mutated gene is p53 tumor suppressor gene. Mutation of p53 gene gives rise to abnormal protein which can be easily detected by immunohistochemistry. Expression of mutant p53 protein has been associated with poor clinical outcome and increased risk of death due to increased aggressiveness of the disease.
Objective: The aim of the study was to see the clinicopathological correlation of mutant p53 expression in colorectal carcinoma.
Method: Total 50 paraffin embedded tissue blocks of histopathologically diagnosed cases of colorectal cancer were evaluated by immunohistochemical staining for mutant p53 expression. The study was performed in Sir Salimullah Medical College, Dhaka (from March, 2018 to February, 2020).
Results: Out of 50 patients studied, 29 cases (58%) expressed mutant p53 protein in the nucleus of malignant cells. There was significant association between p53 protein expression and clinicopathologic variables such as age (<40 years vs >40 years, p=0.032), site of tumor (left vs right colon, p=0.028), pathological type (mucinous vs non mucinous, p=0.039), grade (a greater tendency towards poor differentiation, p= 0.039), advanced stage (both TNM and Dukes), whereas no significant association was found between mutant p53 protien expression and other parameters like gender and morphological types.
Conclusion: The results of this current study revealed that mutant p53 positive colorectal cancer tended to be related to a higher grade of malignancy, advanced tumor stage and mucinous morphology. The results of this current study revealed that mutant p53 positive colorectal cancer tended to be related to a higher grade of malignancy, advanced tumor stage and mucinous morphology. So, p53 is an important immunohistochemical marker for colorectal cancer patients.
[Journal of Histopathology and Cytopathology, 2024 Jan; 8 (1):10-18]
DOI: https://www.doi.org/10.69950/jhc.2024.v8.i1.03
Keywords: Colorectal cancer, p53, Immunohistochemistry
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