A Case of Malignant Melanoma with a Satellite Lesion Showing a Tendency to Disappear Spontaneously

A 70-year-old female first noticed a pigmentation and a black subcutaneous tumor on her right little finger. During the two year period before presentation at the hospital, the color of this subcutaneous tumor became vivid and there after tended to disappear spontaneously. We diagnosed this case to be acral lentiginous melanoma stage 3. She underwent a wide resection of the tumor and a dissection of her right axillary lymph nodes. The subcutaneous tumor in a satellite lesion was considered to be unique since it demonstrated a apparent spontaneous regression.