Zinner Syndrome Unmasked by Workup for Renal Colic and Uncontrolled Hypertension.

Zinner syndrome is a rare hereditary disorder of the mesonephric duct. The triad of the absence of one kidney, ipsilateral cystic dilatation of the seminal vesicle, and ejaculatory duct obstruction makes the diagnosis. Mostly, it is asymptomatic. However, genitourinary manifestations and workup for the incidental absence of one kidney often uncover the disease. Ultrasound and CT scan can identify the absence of a kidney and seminal vesicle cyst, while MRI is the gold standard for diagnostic elaboration of the pelvic anatomy. In this article, we have presented a 51-year-old male patient who presented with renal colic and hypertension. Radiological investigations for the renal colic uncovered the diagnosis of Zinner syndrome incidentally. This case highlights the incidental nature, variability in the clinical presentation, and the diagnostic challenges of this rare disorder. It also emphasizes on the radiologist for a careful evaluation of the pelvic images in patients with unilateral absence of a kidney.