Testicular vein syndrome: hydronephrosis secondary to ureteral compression—a case report

This case highlights the diagnostic challenges of testicular vein syndrome and underscores the importance of detailed imaging and clinical correlation. The proposed Valsalva Flank Pain Sign may serve as a simple bedside tool to raise suspicion of this rare entity. Excretory-phase computed tomography remains the imaging modality of choice for diagnosis. The association with testicular varices suggests a potential shared pathophysiological mechanism involving venous hypertension.