Matsuta M, Segawa I, Akasaka T, Kon S, Nara T, Minato S
Department of Dermatology, Iwate Medical University School of Medicine, Morioka Iwate, Japan.
J Cutan Pathol. 1990 Aug;17(4):246-50. doi: 10.1111/j.1600-0560.1990.tb00094.x.
A 68-year-old woman with amelanotic malignant melanoma (AMM) of her left thumbnail bed was reported. The tumor cells were positive with S-100 protein. Electron microscopic findings revealed the presence of typical melanosomes and a variety of aberrant melanosomes within the tumor cells, obviously different from the results for common malignant melanoma.
