HISTOGENESIS OF NEVUS CELL NEVI - IMPLICA TIONS OF A CASE-STUDY

A case of multiple lesions of junctional melanocytic hyperplasia arisi ng in a skin graft after excision of a congenital melanocytic naevus i s reported. This observation is shown to support the concept of the hi stogenesis of acquired melanocytic naevi proposed by Cramer [2], i.e. that melanocytic naevi are from melanocyte precursors located in nerve sheaths, whereas it is inconsistent with notions of the origin of nae vogenesis in the epidermal melanocyte.