432 Jang et al FIG. 1. A pelvic computed tomography scan showing a left seminal vesicular cyst (*), measuring 6.8x4.1x3.8 cm, and ipsilateral renal agenesis. (A) Cross- sectional view, (B) Coronal view. FIG. 2. A laparoscopic image showing the exposed and dilated seminal vesicular cyst (*). of the wound retractor on the single-port device was in- serted at the umbilicus. The peritoneal cavity was in- sufflated with CO2 gas and 12 mmHg, and a 10 mm 30o rigid laparoscope (Stryker, Kalamazoo, MI) with an integrated camera head was used. The LESS technique was per- formed as described previously [5]. An incision was made in the retrovesical peritoneum and the cyst was easily visualized. The left vas deferens was located and dissected medially to the seminal vesicle. The peritoneal reflection was dissected, developing the space between the bladder and the rectum, and then the dilated seminal vesicle was exposed (Fig. 2). The cyst was drained by aspiration and circumferentially dissected. The cyst was dissected down- ward to its base and excised by use of the LigaSure vessel sealing system (Valleylab, Boulder, CO, USA). The peri- toneum was reapproximated by using an intracorporeal suturing technique and laparoscopic clips. LESS was completed successfully with no additional ports. The total operative time was 125 minutes, and blood loss was minimal. The patient was discharged from the hos- pital on the second postoperative day. There were no com- plications during his postoperative care. The final patho- logic diagnosis was consistent with an inflamed seminal ve- sicular cyst (Fig. 3). The postoperative 6-month follow-up CT scan showed complete excision of the seminal vesicular cyst (Fig. 4). The patient has had no voiding symptoms or Korean J Urol 2011;52:431-433 FIG. 3. Histopathological findings of the seminal vesicular cyst. FIG. 4. Postoperative 6-months follow-up CT scan of the abdomen demonstrating complete resection of the seminal vesicular cyst. recurrent hemospermia. DISCUSSION Congenital anomalies of the seminal vesicle are exceed- ingly rare, but when they occur, they are commonly asso- ciated with anomalies of the urinary and reproductive sys- tems [1]. Seminal vesicular cysts occur in less than 0.005%