Rectal tonsil:A case report and literature review

The rectal tonsil,a reactive proliferation of lymphoidtissue located in the rectum,is rare.Histologically,benign lymphoid hyperplasia of the rectum is usuallycharacterized by large lymphoid follicles with activegerminal centers and a narrow surrounding mantlezone and marginal zone.This lesion is benign,but must be differentiated from the polypoid type of mucosaassociated lymphoid tissue lymphomas.In the current paper,we present a case of rectal tonsil in a 59-yearold woman.We describe the endoscopic ultrasound imaging findings with literature review.