MR Imaging of the Distal Radioulnar Joint.

MR imaging plays a critical role in evaluating the pathology of the distal radioulnar joint (DRUJ), particularly in assessing the integrity of the triangular fibrocartilage complex (TFCC). High-resolution MR imaging and MR arthrography, especially with DRUJ compartment injection, improve the detection of subtle peripheral and foveal TFCC tears. Accurate identification and classification of both Palmer and non-Palmer lesions are essential for guiding arthroscopic treatment and assessing joint stability. Additionally, MR imaging helps evaluate posttraumatic deformity, degenerative changes, and inflammatory arthropathy, all of which may alter DRUJ biomechanics and influence therapeutic decision-making.