Introduction Isolated seminal vesicle cysts not associated with Zinner syndrome is a rare disorder that can present initially with urinary obstructive symptoms or nonspecific groin pain. Case description We present the uncommon case of a dermoid cyst mimicking a seminal vesicle cyst treated with robotic‐assisted laparoscopic seminal vesiculectomy. Conclusion For dermoid cysts, surgical excision is the gold standard of treatment with a high cure rate and little risk of regrowth if spillage is avoided and full resection is completed. Robotic‐assisted laparoscopic surgery is a viable management option with good visualization of the anatomy.