Frequency of all types of colorectal tumors in the patients referred to selected hospitals in tehran.

Background: Colorectal cancer (CRC) is one of the most common cancers worldwide which is not extensively researched in Iran.

Objectives: The present study aims to investigate the epidemiologic characteristics of CRC in patients referred to selected hospitals of Tehran University of Medical Sciences.

Patients And Methods: In this descriptive-analytic study 218 patients with colorectal cancer were investigated.