Immunoexpression of cytokeratin 20 and cytokeratin 7 in colorectal adenocarcinoma in association to histological grade

Muhammad Tariq, Pervez Mohammad, Muhammad Ashraf Salam

Research output: Contribution to journalArticlepeer-review


Objective: To observe the immunoexpression of CK20/CK7 as a tumor marker and its association with histological grade of colorectal adenocarcinoma. Study Design: Observational/cross sectional study. Place and Duration of Study: This study was conducted at the Department of Pathology and Surgery, Post Graduate Medical Institute Lahore and Jinnah Medical College Peshawar from July, 2013 to February, 2015 Materials and Methods: Surgical specimens/paraffin blocks of 60 histopathologically diagnosed cases of colorectal adenocarcinoma were included in this study. Three sections, 4 umthick from each blocks were cut and were stained with H&E and for CK20 and CK7 immunostain respectively. All the slides were evaluated for colorectal adenocarcinoma along with expression of CK20 and CK7. Results: CK2-+/CK7 - immune-phenotype was seen in 38 out of60 (63.33%) cases of colorectal adenocarcinomas. While the CK20+/CK7+ immunophenotype was detected in 9 out 60 (15%) cases of colorectal adenocarcinomas. Similarly the CK20-/CK7-immunophenotype expression pattern was observed in 11/60 (18.33%) cases of colorectal adenocarcinomas. We also observed the CK20 expression in 47 out of 60 (78/33%) and CK7 expression in 11 out of 60 (18.33%) in colorectal adenocarcinomas. Conclusion: There is an association of histological grade and pattern of expression of CK20/CK7.

Original languageEnglish
Pages (from-to)27-31
Number of pages5
JournalMedical Forum Monthly
Issue number1
Publication statusPublished - Jan 2018
Externally publishedYes


  • Colorectal adenocarcinoma
  • Cytokeratin 20 (CK20)
  • Cytokeratin 7 (CK7)
  • Immunohistochemistry (IHC)


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