Abstract
We examined the histopathological findings associated with 775 specimens of acquired melanocytic nevus. We examined the histopathological findings : melanocytic multinucleated giant cells, pseudovasculature, neurotization, epidermal changes resembling seborrehic keratosis, erosion or ulcer, dilated follicular infundubulum, comedo, follicular cyst, lamellar fibroplasia around rete ridges, fibroplasia between nevus cells, lipocytes between nevus cells, hypervasculature, bone formation, and suppurative inflammation. Then, we calculated the frequency of these histopathological findings for each clinico-pathological type (Unna’s, Miescher’s, Spitz’s and Clark’s type) and histopathological type (junctional, compound and dermal type). We believe that it is useful to know how these histopathological findings are associated with acquired melanocytic nevus for histopathological and clinical diagnosis.
