The Histopathological Analysis of 201 Cases of Melanocytic Nevus of the Trunk and Extremities

Abstract

We examined 201HE stained specimen of melanocytic nevi on trunk and extremities excepting the axilla, inguinal area, genital area, hand, and foot. These were histopathologically diagnosed in my laboratory from April 1990 to March 2000. We classified these melanocytic nevi into three groups according to the location of the tumor cells; junctional, compound, and dermal. We measured the length of each lesion under a microscope. We classified the melanocytic nevi according to the clinico-pathological classification advocated by Ackerman that is Unna’s Miesher’s, Spitz’s, and Clark’s nevus. The characteristics of the melanocytic nevus of the trunk and extremities are that the dermal type and the Unna’s type are the most common. We believe that Unna’s nevus has the character of congenital melanocytic nevus.