title: Colonization of nonmelanocytic cutaneous lesions by dendritic melanocytic cells: a simulant of acral-lentiginous (palmar-plantar-subungual-mucosal) melanoma.
abstract: Four cases of colonization of nonmelanocytic lesions by dendritic melanocytic cells are reported, one in a verruca vulgaris of the lip, one in a squamous cell carcinoma in situ of mucous membrane overlying a tonsil, one in a lesion of lichen simplex chronicus with a nevocellular nevus of the external ear, and one in a dermatofibrosarcoma protuberans (Bednar tumor). This is an important biological process of melanocytes that must not be confused with the acral-lentiginous (palmar-plantar-subungual-mucosal (P-S-M) melanoma. It is probably much more common than the paucity of published reports would indicate.
mesh_terms: D000328:Adult; D002294:Carcinoma, Squamous Cell / Q000473:pathology; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D007911:Lentigo / Q000473:pathology; D008297:Male; D008544:Melanocytes / Q000473:pathology*; D008545:Melanoma / Q000473:pathology*; D008875:Middle Aged; D009092:Mucous Membrane / Q000473:pathology; D009506:Nevus / Q000473:pathology; D012594:Scleroderma, Localized / Q000473:pathology; D012878:Skin Neoplasms / Q000473:pathology*; D014067:Tonsillar Neoplasms / Q000473:pathology