Primary rectal amyloidosis in a patient with human immunodeficiency virus.

Amyloidosis can involve a single organ or multiple organs. The gastrointestinal tract is a common site of amyloid deposition. We report a rare case of solitary rectal amyloidosis in a patient with human immunodeficiency virus who had experienced recurrent oral candidiasis for 3 months and intermittent diarrhea for 6 months. The lesion was confirmed histologically and there were no detectable amyloid lesions at other gastrointestinal sites or systemic involvement.