Atypical cellular blue nevus: A case report and review of literature

Abstract

Blue nevi are benign neoplasms of many variants which have several similar histological, clinical and immunochemical features. The two most frequent types are dendritic/common blue nevus and cellular blue nevus. Atypical blue nevus is a rare variant of cellular blue nevus whose characteristics are usually confused with malignant blue nevus/malignant melanoma which arise in a cellular blue nevus. Our paper describes a case of a 59-year-old woman who presented with a pigmented lesion in her right gluteal region which started itching and slowly grew in the last 20 years. After surgical resection, histopathological examination showed a nodule which had features that were consistent with atypical cellular blue nevus.