Mesorchial testicular torsion: case report and a review of the literature.

Testicular torsion can be extravaginal, intravaginal, or mesorchial. Mesorchial torsion is less well defined and has an atypical presentation. Here we present the case of a 13-year-old with severe, intermittent right scrotal pain, erythema, and a large hydrocele. Color Doppler ultrasound examination showed epididymal enlargement and normal flow. Weeks after presentation, serial color Doppler ultrasound examinations showed epididymal enlargement and decreased perfusion. A literature review for testicular torsion etiology and clinical and radiologic findings documents this as the only recorded case of mesorchial testicular torsion with clinical and radiologic findings. Atypical pain, if persistent, requires careful reassessment, radiologic studies, and surgical exploration.