Zinner syndrome: an incidental diagnosis of a rare congenital urogenital malformation

A man in his 20s, with a history of surgically corrected right-sided cryptorchidism during early childhood, arrived for medical consultation as part of a general check-up. As part of our institution executive check-up plans, an abdominal ultrasound was requested, showing absence of the right kidney. An MRI of the abdomen and pelvis was performed to better characterise the findings, demonstrating unilateral right renal agenesis, associated with a distally dilated ectopic right ureter communicating with a right seminal vesicle cyst and obstruction of the right ejaculatory duct ( figure 1).