Figure 2c. Exophytic dermatofibrosarcoma protuberans in the lower thigh of a 45-year-old man. (a) Axial unenhanced CT image shows a large mass with ulceration at the skin surface (arrowheads). (b) Axial short inversion time inversion recovery (4000/20/150) MR image shows extension of the protuberant mass along the skin layers and into the cutaneous and subcutaneous fat. (c) Photograph of a gross specimen cross section shows the mass with linear extension along the skin layers (arrows), features identical to those seen at imaging. Scale is in centimeters.