臨床的に診断が困難と思われた頭部有茎性悪性黒色腫の1例

抄録

We report a case of amelanotic polypoidal (pedunculated) melanoma of the scalp. This case is very difficult for diagnosis of malignant melanoma clinically. The patient was operated it by former doctor under the diagnosis of fibroma, but histological findings revealed malignant melanoma, so consulted to our clinic. We confirmed malignant melanoma histologically, extending to Clark's level IV, Breslow's tumor thickness: 6.8mm, _pT₃ N₀ M₀, Stage II. We performed it wide excision, skin graft and chemotherapy. Until now, we can not find local recurrence and metastatic lesion.
Pedunculated Malignant Melanoma (PMM) is considered as a variant of the Nodular Melanoma (NM), and recently, it is not so rare growth pattern. Therefore when we face to pedunculated tumors, we should remember PMM.