Increased presacral space

Increased retrorectal space

Common: Bladder cancer; Carcinoma of rectum; Cervical cancer; Crohn disease; Dermoid; Diverticulitis; Enteric duplication cyst; Extrinsic soft tissue mass; Lipoma; Lymphadenopathy; Metastasis; Normal variant; Ovarian cancer; Ovarian cyst; Ovarian neoplasm; Ovarian tumor; Pelvic abscess; Postoperative state; Presacral abscess; Presacral hematoma; Prostate carcinoma; Radiation fibrosis; Radiation proctitis; Sacrococcygeal lesion; Tail gut cyst; Teratoma; Trauma; Ulcerative colitis; Urinoma
Uncommon: Amebiasis; Amyloidosis of colon; Anal carcinoma; Anterior sacral meningocele; Colitis cystica profunda; Cushing syndrome; Endometriosis; Gastrointestinal stromal tumor; Hemangioendothelioma; Hemangioma; Hemorrhoidal injection; Inferior vena cava obstruction; Inguinal hernia with rectal traction; Ischemic colitis; Lymphocele; Lymphogranuloma venereum; Lymphoma of rectum; Lymphoma of retrorectal soft tissues; Pelvic lipomatosis; Pneumatosis intestinalis; Pneumoretroperitoneum; Proctitis; Retroperitoneal fibrosis; Rhabdomyosarcoma; Sarcoma; Schistosomiasis; Sexual trauma; Tuberculosis