Pseudomelanosis duodeni: a clinicopathologic entity.
D000368:Aged; D001706:Biopsy; D004378:Duodenal Diseases / Q000473:pathology*; D004386:Duodenum / Q000473:pathology / Q000648:ultrastructure; D004724:Endoscopy; D005260:Female; D006801:Humans; D008297:Male; D008548:Melanosis / Q000473:pathology*; D008854:Microscopy, Electron; D008875:Middle Aged; D010859:Pigmentation Disorders / Q000473:pathology