title: Characteristics of melanosis duodeni: incorporation of endoscopy, pathology, and etiology.
abstract: Endoscopic features and analytical electron microscopic studies in a case of melanosis duodeni are reported. The pigment in the microphages is confirmed as being iron sulfide. The etiology of this unusual endoscopic presentation is hypothesized.
mesh_terms: D004378:Duodenal Diseases / Q000175:diagnosis* / Q000473:pathology; D004384:Duodenoscopy; D006801:Humans; D008297:Male; D008854:Microscopy, Electron; D008875:Middle Aged; D010859:Pigmentation Disorders / Q000175:diagnosis* / Q000473:pathology; D014961:X-Ray Diffraction