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Background: Surgical scars are not a well-known risk factor for the development of dermatofibrosarcoma protuberans (DFSP). However, DFSP can arise within a surgical scar.  Objective: This study determined the number of DFSP found within scars from prior surgical procedures at a tertiary academic cancer center.  Methods: A retrospective data analysis was performed of all patients with biopsy-proven DFSP from January 2000 to April 2018 at MD Anderson Cancer Center (MDACC), a tertiary referral cancer center. Chart review was performed, and data were recorded for gender, race, and age of patients. We also recorded the site, location, and size of the DFSP and whether the patients had a history of prior surgery at the DFSP site. All patients had a pathologic diagnosis of DFSP at MDACC. Patients were selected from the pathology database at MDACC using the keywords “DFSP” or “dermatofibrosarcoma protuberans”. A total of 458 patients were identified; however, 94 patients were excluded from the study because they were only referred to MDACC with a confirmed diagnosis of DFSP and were not seen as patients by a MDACC physician.  Results: Of the remaining 364 patients, 37 patients (10.1%) had either a history of a benign neoplasm or an inflammatory disease that had been evaluated or treated by either punch biopsy, shave biopsy, or minor excision at the site of DFSP (8.5%, 31 patients) or a DFSP arising within a major surgical procedural scar (1.6%, six patients). The surgical sites identified were the abdomen (four patients) and the groin (two patients). Three of the patients with a major surgical scar DFSP had prior laparoscopic surgery at the site.  Conclusions: DFSPs occur at surgical scars. The development of surgical scar DFSP in 10% of our patients prompts us to postulate that the neoplasm may be associated with the malignant transformation of these scars.

Dermatofibrosarcoma Protuberans Found Within Procedural Scars: A Retrospective Review at a Tertiary Referral Cancer Center