Case presentation A 49-year-old female was admitted to the emergency department with complaints of anorectal pain and fever. Medical history Anorectal pain for three months Fever for one day Circumferential 4th-degree hemorrhoids Underwent double-purse string stapled hemorrhoidopexy three months ago Complained of perianal discomfort and difficulties in defecation six weeks after the operation MRI examination: Presence of rectal ring cyst Underwent incision and drainage through the edge of the anus Complained of persistent symptoms Endoanal ultrasonography: Clear fluid containing a cystic lesion circuit to the rectum and the rectal wall surrounding the cyst (Figure 1A) Subsequently underwent puncture and drainage through the vagina.
Medical and laboratory examination Depite drainage, anal pain and fever aggravated. Body temperature: 39.8°C Rectal examination: Submucosal induration in the…
