2019 Volume 34 Issue 1 Pages 46-49
A 66－year－old man presented with a mass on the right side of the chest, which he had noticed 2 years before the first visit. Although he underwent resection, relapse was confirmed at the same site approximately after 1 year. Subsequently, a marginal excision of the tumor was performed ; however, cancer cells remained after the surgery. Histopathology of the excised tumor specimen indicated cutaneous leiomyosarcoma. A positron emission tomography－computed tomography scan revealed an accumulation of fluorine－18 deoxyglucose in the lymph node of the right axilla. We performed an enlarged resection, and a right axillary lymph node biopsy specimen was obtained. Histopathology revealed that the tumor cells infiltrated into the deep dermis of the primary tumor but were not present in the lymph node. This patient with cutaneous leiomyosarcoma can be considered as having a good prognosis ; however, because of the infiltration of tumor cells into dermal layers, a careful follow－up is necessary.[Skin Cancer (Japan) 2019 ; 34 : 46－49]
