Blue Nevus: a case report

Abstract

A 44-years-old male patient, was referred to the stomatologist by the clinical dentist who detected the lesion on the palate. During anamnesis, the patient reported having used crack and cocaine and currently uses marijuana and alcoholic beverages, with a history of peeling and burning in the oral mucosa after use of “ether spray”. On the intraoral exam, pigmented macula was observed on the hard palate, well circumscribed, measuring approximately 4mm, with unknown evolution time. The diagnostic hypothesis was of melanocytic macule. An excisional biopsy was performed and the material was sent for microscopic analysis with histopathological diagnosis of blue nevus. The blue nevus is a benign pigmented lesion composed of nevus or melanocytic cells. It is the second most common melanocytic nevus in the oral cavity, being the palate the most frequent site. The relevance of this report consist on the fact that the blue nevus makes differential diagnosis with the melanoma, malignant neoplasm of melanocytic origin. Therefore, oral pigmented lesions with unknown evolution should be investigated to avoid this possibility.