臍部に生じた悪性黒色腫

・臍部原発の悪性黒色腫を経験した．

・ダーモスコピー，血液検査，CT検査，皮膚生検より臍部原発の悪性黒色腫と診断した．

・黒色斑より水平方向に2cm離し，臍の深部では腹膜を含め切除した．手術標本では皮膚，腹膜への腫瘍の露出はなく，センチネルリンパ節（SLN）への転移はなかった．tumor thicknessは1.0 mmの悪性黒色腫（pT1bN0M0）と診断した．術後1年の間に再発，転移，合併症はない．

（「症例のポイント」より）

　

A case of primary umbilical malignant melanoma

　

Kanamoto, Mayu1）Amano, Asuka2）Tsuboi, Satoshi3）Kawai, Mikio1）Watadani, yusuke4）Hide, Michihiro1） 1）Department of Dermatology, Hiroshima University 2）Department of Dermatology, JA Hiroshima General Hospital 3）Department of Dermatology, Tokyo Metropolitan Bokutoh Hospital 4）Department of Surgery, Hiroshima University

　

A 49-year-old woman noticed a black spot on the umbilical area around the age of 30. The spot had expanded for several years until her first visit to our department. Based on the inspection of dermoscopy and skin biopsy, diagnosis was primary umbilical malignant melanoma. The tumor was removed with 2 cm margin from the black spot. The deep part of the navel was excised including the peritoneum. Sentinel lymph node biopsy of both groin was performed simultaneously. Tumor was diagnosed as malignant melanoma with 1.0mm (pT1bN0M0). Recurrence, metastasis and complications are not bserved in one year post operation period.