Ultrasound of Groin Pain in the Athlete.

Groin pain is a common cause of disability in athletes. Imaging is crucial in a clinical diagnosis, given the multiple associated etiologies. The main sites of groin pain are the adductors, iliopsoas muscles, inguinal ring, hip joint, and pubic symphysis. Although magnetic resonance imaging is the gold standard to image groin pain, ultrasound (US) offers excellent accuracy in pinpointing muscle injuries, inguinal disruption, and hernias. US requires a detailed knowledge of anatomical landmarks; imaging pitfalls, and pathologic patterns. We review the complex anatomy of the groin region, the sonographic appearance of the involved structures, and the strengths and weaknesses of US.