“…12,18 Histologically the lesion may be composed of spindle cells showing intracytoplasmic melanin, or nests of large cells with scanty eosinophilic cytoplasm and large hyperchromatic nuclei with prominent nucleoli, or large pleomorphic cells with abundant cytoplasm, large vesicular bizarre nuclei, and prominent abnormal mitoses. 1,5,6,8,[21][22][23] Junctional change was not found by Owens et al, 1 who reported a case based on circumstantial evidence suggesting malignant transformation of preexisting melanosis to melanoma in the absence of primary melanoma elsewhere. The stroma may be desmoplastic.…”