Cystadenomas of the seminal vesicles are extremely rare. Here, we report a large seminal vesicle cystadenoma. A 37-year-old man presented a 6-month history of haemospermia, 10 days of Lower Urinary Tract symptoms (LUTSs) and gross haematuria. Transabdominal ultrasonography, computed tomography and magnetic resonance imaging were performed and revealed a large solid-cystic pelvic mass morphometrically measured 7.0 cm × 11.9 cm × 8.6 cm on the right seminal vesicle, which caused hydronephrosis of the right kidney. The prostate-specific antigen of the patient was 27.860 ng/dl. Laparoscopic exploration found the capsule of tumour was complete and the tumour came from the right seminal vesicle, in addition, the mass had a certain space with the bladder and prostate, which could be separated. So a nerve-sparing Laparoscopic Vesiculectomy was performed at last, even though the intraoperative frozen section analysis could not make sure the nature of the tumour either. The postoperative pathology revealed cystadenoma of the seminal vesicle.
Keywords: cystadenoma; laparoscope; seminal vesicles.
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