title: The nature of "blue nevus" in cystic teratomas of the ovary. An ultrastructural evidence for Schwann cell origin.
abstract: The ultrastructural findings of two cases of "blue nevus" in ovarian benign cystic teratomas are described. The bipolar or dendritic pigmented cells showed features of Schwann cells with melanin synthesis, but not of ordinary melanocytes. This study supports the neural origin of blue nevus.
mesh_terms: D000328:Adult; D003884:Dermoid Cyst / Q000648:ultrastructure*; D005260:Female; D006801:Humans; D008854:Microscopy, Electron; D009508:Nevus, Pigmented / Q000648:ultrastructure*; D010051:Ovarian Neoplasms / Q000648:ultrastructure*; D012583:Schwann Cells / Q000648:ultrastructure