Contrast-enhanced computed tomography findings of a huge perianal epidermoid cyst: A case report

Figure 2 Contrast-enhanced computed tomography images. A-C: Contrast-enhanced computed tomography images revealing a cystic low density shadow with a smooth edge. The wall of the cyst was not enhanced and there were no blood vessels in and around the mass in the venous phase, arterial phase, and delayed phase; D and E: The upper right edge of the mass was very close to the anal canal.