Dermatofibrosarcoma protuberans (DFSP) is a slow growing dermal tumor with a very low metastatic potential but with significant subclinical extension and capacity for local destruction with local recurrence rates ranging from 0 to 50%. Controversy exists regarding margin width and excision techniques, with some advocating Mohs surgery and others wide excision. We reviewed the excision technique along with the recurrence rates at a tertiary care center in eastern India. This study is a retrospective review of patients with DFSP from June 2011 to September 2018. Patients had initial wide excision using 2-3 cm margins with primary closure or reconstructive procedure; re-excision was done for positive margins. Pathologic analysis included en face sectioning. We evaluated margin width, number of excisions, reconstruction methods, radiation, and outcomes. A total of 31 patients with DFSP (15 males, 16 females), median age 41 years (range 14-82), were treated. Locations were extremities (13), trunk (12), and head and neck (06). The median number of excisions to achieve negative margins was 1 (range 1-3). Closure techniques included primary closure (13; 42%), tissue flaps (13; 42%), and skin grafting (05; 16%). There were 11 patients who received postoperative radiation, 4 for positive margins after maximal surgical excision. At a median follow-up of 24 months (range 1-72), 2 patients (6.5%) recurred locally, and 1 patient (3.2%) had lung metastasis. Using a standardized surgical approach including meticulous pathologic evaluation of margins, low recurrence rate (10%) was achieved with adequate margins (2-3 cm).
Keywords: DFSP; Dermatofibrosarcoma protuberans; Fibrosarcoma; Soft tissue sarcoma.
© Indian Association of Surgical Oncology 2019.