A Case of Melanocytic Nevus Combined with an Vellus Hair Cyst / 대한피부과학회지

ABSTRACT

A nevus with cyst is defined as a single lesion of a melanocytic nevus, and this is commonly associated with an epidermal cyst. There have been rare reported cases of adnexal origin. The combination of nevus and cyst could possibly be misdiagnosed clinically as a malignant melanoma at initial examination. A 51-year-old woman presented with a painful, solitary, dome-shaped, erythemaous nodule on the forehead which had been present for several years. The histopathologic specimen of the nodule showed a solitary cyst with a melaocytic nevus. There were nevus cells without junctional activities in the upper dermis and melanin pigments in the upper dermal nevus nest. It contained lamellated keratin materials and vellus hair shafts. We report here a rare case of melanocytic nevus combined with an vellus hair cyst in a 51-year-old woman.