Abstract
We report a 35-year-old male patient with chronic constipation and infertility for 4 years. Spermiogram revealed severe oligospermia. An external mass compressing the rectum was found during rectal examination and flexible rectosigmoidoscopy. Abdominal computed tomography showed a presacral cystic mass which displaced the bladder anteriorly. The cyst was completely removed with open surgery. Histopathologic analysis revealed a cystic lesion covered with squamous epithelium including polymorphonuclear leukocytes, macrophages and sperm cells. After the operation, the patient's symptoms were relieved. We considered that the constipation was caused by external compression by the vesicula seminalis cyst. In cases of constipation with infertility, vesicula seminalis cyst should be kept in mind.