Ulnar collateral ligament (UCL) reconstruction is now being performed more commonly and on younger patients than in prior decades. As a result, radiologists will increasingly be asked to evaluate elbow imaging of patients presenting with pain who have had UCL reconstruction. It is essential for radiologists to understand the normal and abnormal imaging appearances after UCL reconstruction and ulnar nerve transposition, which is also commonly performed in overhead-throwing athletes. Doing so will allow radiologists to provide accurate interpretations that appropriately guide patient management.
Keywords: Baseball; Magnetic resonance imaging; Medial collateral ligament reconstruction; Throwing athlete; Ulnar collateral ligament reconstruction; Ulnar nerve transposition; Ulnar neuritis; Ultrasound.