Requena L. M.D.; Barat, A. M.D.; Hasson, A. M.D.; Arias, D. M.D.; Gutiérrez, M. C. M.D.; Martin, L. M.D.; de Castro, A. M.D.The American Journal of Dermatopathology: April 1991 Extraordinary Case Report: PDF Only Buy Abstract This report describes an example of combined nevus with malignant transformation. The clinical impression was blue nevus. Hisiologically, the lesion was composed of a cellular blue nevus in the rcticular dermis and an overlying compound mclanocytic nevus. The junctional component of the melanocytic nevus showed transition to malignant melanoma in situ. A review of the literature failed to find a precedent for the present case. © Lippincott-Raven Publishers.