Ultrasonographic and Computed Tomographic Diagnosis of Seminal Vesicle Cyst Associated with Ipsilateral Renal Agenesis: A Case Report

A rare case of seminal vesicle cyst associated with ipsilateral renal agenesis is reported. The role of ultrasonography and computed tomography in diagnosis and management is discussed. Congenital malformations of the seminal vesicle are most uncommon and most of them are cystic malformation. Approximately two thirds of them are associated with ipsilateral renal agenesis, since both the ureteral bud and seminal vesicle originate from the mesonephric duct. These were first described by Zinner in 1914 and nearly 120 cases had been reported till 1993. Most patients with this anomaly are asymptomatic or present during early adulthood with non-specific symptoms such as prostatism, urinary urgency, dysuria, painful ejaculation and perineal discomfort. Usually the cysts are 5.0cm or less in diameter and are either a symptomatic or present during early adulthood with symptoms such as urgency, burning, haematuria and hypogastric pain mainly after coitus. Less frequently cysts larger than 8-10 cm occur and such giant cysts can result in colon or bladder obstruction with palpation of mass per rectum. Recent advances in imaging techniques allow a better visualization of the prostate and surrounding structures. The application of transrectal ultrasonography has assumed a significant role in the management of these lesions. There have been few reports of the usefulness of computed tomography (CT) scan in such cases. In this case report, we insist that non-invasive imaging with ultrasonography and CT scan would be sufficient to diagnose case of seminal vesicle cyst associated with renal agenesis for management.