Continued change in the distribution of colorectal carcinoma

Br J Surg. 1998 Feb;85(2):246-8. doi: 10.1046/j.1365-2168.1998.00507.x.


Background: The aim of this study was to determine whether the previously reported shift in carcinoma from the left colon to the right colon has progressed.

Methods: The charts of 2169 patients admitted to one institution between 1979 and 1994 with a diagnosis of colorectal carcinoma were reviewed retrospectively. The study was divided into four equal intervals. The large bowel was divided into five regions: right, transverse, left, sigmoid and rectum.

Results: Right-sided lesions increased from 20.6 to 29.9 per cent (P = 0.001) and rectal lesions decreased from 22.0 to 11.3 per cent (P = 0.0002) from the first to the fourth study interval. The frequency of transverse, left and sigmoid colon lesions remained relatively constant.

Conclusion: The continuing trend of increased incidence of right-sided lesions and decreased incidence of rectal lesions was documented. Any screening examination for carcinoma requires total examination of the colon.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Colonic Neoplasms / epidemiology
  • Colonic Neoplasms / pathology*
  • Humans
  • Incidence
  • Quebec / epidemiology
  • Rectal Neoplasms / epidemiology
  • Rectal Neoplasms / pathology*
  • Retrospective Studies