Right and left colon carcinoma: A retrospective comparative study

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Abstract
We studied 347 patients with primary colorectal carcinoma treated by surgery during 1973‐1983: 64 (18.2%) with right colon carcinoma, 158 (45.7%) with left colon carcinoma, 14 (4.2%) with transverse colon carcinoma, and 110 (31.9%) with rectal carcinoma. We compared the right‐sided carcinoma (RSC) and left‐sided carcinoma (LSC) groups. Obstruction was found in 17.2% of RSC compared with 20.3% LSC patients (P > 0.05). Advanced disease (Dukes stages C and D) was found in 34.4% on the right and 47.8% on the left side (P = 0.01). Crude 5‐year survival rate, by life table method, was 71% on the right and 66% on the left side (P > 0.05); this difference became significant (P = 0.03) when Dukes stage B patients were compared. We conclude that patients with RSC are not diagnosed, as is commonly believed, at advanced stages of the disease. We found that the 5‐year survival rate of RSC patients was the same or, occasionally, better than that of LSC patients.

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