title: [Malignant blue nevus in Ota's nevus].
abstract: A 21-year-old Caucasian woman with congenital nevus of Ota developed a subcutaneous tumor below the lacrimal sack within the area of discoloration. The tumor, located subcutaneously, has been present for 4 years. Histologically, parts of the tumor showed neuroid structures as well as those like cellular blue nevus. In one part, however, malignant transformation features could be found.
mesh_terms: D000328:Adult; D005142:Eyelid Neoplasms / Q000473:pathology*; D005153:Facial Neoplasms / Q000473:pathology*; D005260:Female; D006801:Humans; D007765:Lacrimal Apparatus / Q000473:pathology; D007766:Lacrimal Apparatus Diseases / Q000473:pathology; D009378:Neoplasms, Multiple Primary / Q000473:pathology*; D009508:Nevus, Pigmented / Q000473:pathology*; D012867:Skin / Q000473:pathology
vernacular_title: Maligner blauer Nävus bei Nävus Ota.