Pleomorphic dermal sarcoma of the right acromion in a 59－year－old male patient

Abstract

A 59－year－old male patient presented with a mass on his right shoulder 6 months ago. The mass previously disappeared a month after its appearance. Thereafter, however, it exhibited rapid growth within a few weeks. During the initial examination, a solid 60－mm tumor growing outwards was observed. At the time of surgery, there was no invasion of the deep fascia, and the tumor was resected to the subcutaneous tissue layer. A postoperative histopathological examination revealed that the tumor was malignant. However, a more detailed diagnosis required an external consultation, which took time. Meanwhile, on postoperative day 13 , redness of the wound appeared, which suggested that the tumor had recurred. Since the tumor was growing rapidly, we decided to perform an extended resection as soon as possible. A repeat surgery was performed on day 21 following the initial resection. The inferior bed was resected in a single mass, including the trapezius muscle. It was then reconstructed using a parascapular skin valve with a 2－cm margin removed from the redness that appeared around the previous surgical scar. A histopathological examination revealed that the patient had pleomorphic dermal sarcoma (PDS). There was no local recurrence or metastasis at 13 months post－surgery. [Skin Cancer (Japan) 2021 ; 36 : 245－253]