2019 Volume 129 Issue 7 Pages 1505-1510
Two unique cases of melanocytic nevus with satellite lesions are reported. The first was a 33-year-old woman who had had a melanocytic nevus on her left hip since she was an elementary student. A previous physician had noted that small pigment spots had increased around the lesion. The main lesion, as well as a satellite lesion, showed an intradermal type of melanocytic nevus. Nevus cells were found in the lymphatic vessels of the satellite lesion. The second case was a 5-year-old boy who had had a pigment spot on his left sole since infancy. The lesion had grown bigger and multiple small pigment spots appeared around it by about 2 to 3 years of age. The main lesion was diagnosed as a compound type melanocytic nevus, and a satellite lesion was diagnosed as a junctional type melanocytic nevus. It appears that the satellite lesion had appeared due to lymphogenous dissemination of nevus cells from the main lesion in the first case and due to melanoblasts, which are invisible to the naked eye, turning into nevus cells and becoming visible at multiple sites at a different time in the second one.