The aim of the study was to prospectively evaluate pre- and postoperative findings of cystodefecoperitoneography (CDP) and to correlate the findings to the clinical examination in patients with genital prolapse. Twenty-five female patients were investigated both pre- and postoperatively with a standardized questionnaire, clinical examination and CDP, including contrast medium in the rectum, vagina, bladder, small bowel and peritoneal cavity. At preoperative clinical examination a rectocele was diagnosed in 24 patients, a cystocele in 7 and an enterocele in 2. At the preoperative CDP a rectocele was diagnosed in 21 patients, a cystocele in 22 patients and a peritoneocele in 9, of which six contained small bowel (i.e. an enterocele). Surgery was performed according to the clinical findings. At the postoperative clinical examination no rectocele was diagnosed, a cystocele was diagnosed in 3 patients and an enterocele in 1. Postoperative CDP showed a rectocele in 4 patients, a cystocele in 24 and a peritoneocele in 7 patients, of which three contained small bowel (i.e. an enterocele). CDP may complement the clinical assessment of patients with genital prolapse, in particular to confirm or detect defects involving the posterior compartment. The radiologic definition of cystocele needs further evaluation.