Figure 1

Clinicla photograph 1a) The perianal mass prior to excision was firm and revealed skin ulceration. 1b) The wound following en-bloc excision of the tumor. 1c) The excised specimen measured 7 × 6.5 × 5 cm and revealed a previous biopsy cavity. On serial sectioning, the tumor appeared well-defined, firm and gray-to-white in color.