Zinner syndrome is a rare male genitourinary tract disorder associated with seminal vesicle cysts and ipsilateral renal agenesis. Clinical presentation often involves symptoms of the genitourinary tract. We present a case report of a young Saudi male, presenting with nonspecific symptoms of fatigue and malaise. Ultrasound visualized a massive seminal vesicle cyst associated with ipsilateral renal agenesis. The cyst was managed using a laparoscopic technique without any immediate complications and an uneventful postoperative period.