Dermatofibrosarcoma protuberans (DFSP): growth characteristics based on tumor modeling and a review of cases treated with Mohs micrographic surgery.

Dermatofibrosarcoma protuberans (DFSP) is a relatively rare cutaneous tumor that is clinically challenging since it is locally highly invasive and aggressive, although it rarely metastasizes. Traditionally, wide and deep local surgical excision has been regarded as the treatment of choice for DFSP. However, even 3-cm-wide local excision margins have resulted in a local recurrence rate of 11%. In recent years, reports of DFSPs successfully treated with Mohs micrographic surgery have been appearing in the literature. The DFSP literature is reviewed here, including worldwide experience reported to date in the use of Mohs surgery to excise DFSPs. Using this margin control technique, the recurrence rate is shown to be 2.4%, much lower than the best previously reported recurrence rate of 11% when wide local excision was used. Three-dimensional reconstructions of DFSPs, based on Mohs micrographic surgical technique, are also presented. These illustrations provide new insight into the growth characteristics of these tumors and why Mohs micrographic surgery is emerging as the treatment of choice for DFSP.