Richter's syndrome in colon: case report.
BACKGROUND
The development of diffuse large B cell lymphoma during the course of chronic lymphocytic leukemia is known as Richter's syndrome, considered as one of the most serious complications of this disease. It occurs mainly in lymphoid tissues and organs, for which extranodal involvement--especially in the gastrointestinal tract--is not common.


CONCLUSIONS
We describe here the case of a 61-year-old patient with lower gastrointestinal bleeding caused by colonic involvement of the syndrome.
Division of Gastroenterology, Peruvian Japanese Centenary Clinic, Av. Paso de los Andes 675, Pueblo Libre, Lima 21, Peru. dralfonso_al@yahoo.com
Alfonso
A
Chacaltana Mendoza
Julio
J
Espinoza García
D003110:Colonic Neoplasms / Q000473:pathology*; D006801:Humans; D015451:Leukemia, Lymphocytic, Chronic, B-Cell / Q000473:pathology*; D016403:Lymphoma, Large B-Cell, Diffuse / Q000473:pathology*; D008297:Male; D008875:Middle Aged; D016609:Neoplasms, Second Primary / Q000473:pathology*; D013577:Syndrome