Blue Nevus With Satellitosis Mimicking Malignant Melanoma

Blue nevus rarely develops a malignant melanoma. The loss of the regular border and the development of satellite lesions are ominous clinical indicators of the malignant change. A case is presented in which both of these clinical features—irregular border and satellite lesions—were present, but no malignant change was observed histopathologically. To our knowledge, such a single nodule with satellite lesions mimicking malignant melanoma has not been described previously.