title: Melanuria.
abstract: The urinary cytologic findings in a patient with metastatic malignant melanoma, diffuse melanosis and melanuria are presented. The melanosis was diagnosed from the clinical appearance of a generalized slate-blue skin discoloration, which is probably caused by dermal deposition of excess melanin pigment. The melanuria was characterized microscopically by the presence of amorphous, dark-brown casts, which stained positively for melanin pigment, and numerous pigment-laden macrophages.
mesh_terms: D001416:Back Pain / Q000209:etiology / Q000473:pathology / Q000652:urine; D006801:Humans; D008048:Lip Neoplasms / Q000150:complications / Q000601:surgery; D008207:Lymphatic Metastasis; D008297:Male; D008543:Melanins / Q000652:urine*; D008545:Melanoma / Q000150:complications / Q000473:pathology / Q000601:surgery; D008875:Middle Aged; D009378:Neoplasms, Multiple Primary; D012867:Skin / Q000473:pathology; D012878:Skin Neoplasms / Q000150:complications / Q000473:pathology / Q000601:surgery
chemical_list: D008543:Melanins