Spectrum of Genitourinary Dysgenesis on Magnetic Resonance Imaging: A Case Series of Zinner and Mayer-Rokitansky-Küster-Hauser Syndromes.

Congenital anomalies of the genitourinary system are uncommon but clinically significant due to their impact on urinary and reproductive function. Zinner syndrome and Mayer-Rokitansky-Küster-Hauser (MRKH) syndrome are rare developmental disorders involving the mesonephric and Müllerian ducts, respectively, and often present with nonspecific clinical features, making imaging essential for accurate diagnosis. We present a series of three cases evaluated using magnetic resonance imaging (MRI). One case involved a young male presenting with dysuria and testicular discomfort, demonstrating unilateral renal agenesis, an ipsilateral seminal vesicle cyst, and an associated atretic ureter, consistent with Zinner syndrome. The other two cases involved young females presenting with primary amenorrhea. MRI revealed the absence of the uterus and upper vagina with normal ovaries in both cases, consistent with MRKH syndrome, with one case showing associated bilateral ectopic kidneys. MRI provided a comprehensive evaluation of pelvic anatomy, clearly delineating the congenital anomalies and associated findings. Recognition of characteristic imaging features is essential for accurate diagnosis and appropriate clinical management.