A retrorectal epidermoid cyst is an uncommon congenital lesion that arises from the remnants of the embryonic tissues. This type of cyst is difficult to diagnose before surgery. In this study, we report a rare case of a giant retrorectal epidermoid cyst in a year-old woman. Initially, the condition was diagnosed as a perianal abscess and treated with incision and drainage.
Perianal abscess is a superficial infection that appears as a tender red lump under the skin near the anus. The infection occurs when bacteria gets trapped in the crypt glands that line the anal canal. This type of abscess happens most often in male babies under a year of age. It may drain pus on its own and then heal and disappear. Perirectal abscess is different from perianal abscess.
An anal, or rectal, abscess occurs when a cavity in the anus becomes filled with pus. It causes extreme pain, fatigue , rectal discharge, and fever. In some cases, anal abscesses can result in painful anal fistulas.