Non-Hodgkin's lymphoma often involves the gastrointestinal tract, but
primary lymphoma of the colon is rare. Primary lymphoma of the colon m
asquerading as inflammatory bowel disease is even rarer. We report a p
atient with an initial diagnosis of Crohn's colitis, who later appeare
d to have had non-Hodgkin's lymphoma of the colon. We review the diagn
osis and treatment of this rare disease.