Background: Colorectal cancer rank third of the most common cancers worldwide with increasing rate in many
societies including the middle east countries. Many theories stated that there is a relation between colorectal
malignancy and appendectomy.
Objectives: To determine the relation in between the colorectal cancer and appendectomy.
Design: Observational retrospective study.
Setting: Armed Forces Hospitals, Taif, Saudi Arabia.
Patients and methods: We reviewed from our database in Armed forces hospitals the patients who were
diagnosed and operated for colorectal cancer in the period between October 2018 till October 2020. Our study
included 79 patients. 73 of them were colon cancer and rectal cancer cases were 6. 12 of those patients we couldn’t
obtain their complete data either they died, or no contact details were available.
Results: Our results revealed no significant relation between patients who underwent appendectomy and
development of cancer later.
Conclusion: Our data didn’t support the hypothesis that patients with previous appendectomy have a higher risk
of developing colorectal adenocarcinoma.
Key words: Colorectal cancer, post appendectomy, risk.