Two cases of pigmented nevus of the oral mucosa

A pigmented nevus is defined as a hamartomatous proliferation of nevus cells. It is a very common skin lesion. Pigmented nevi of the oral mucosa are considered a rare lesion and only a few cases have been reported in Japan.We recently encountered 2 cases of pigmented nevus. The first case was in a 26-year-old man. The nevus was located on the buccal mucosa and measured 4×5mm. The other case was in a 23-year-old woman. She had a nevus on the palatal mucosa for about 15 years. The nevus had grown slowly and measured 40×18×5mm at the time of presentation. She had no symptoms. The nevus was resected in both patients. There has been no recurence in either patient as of 2 year after the operation.