Radial collateral ligament injury - ring finger
Trauma - ring finger proximal interphalangeal joint swelling and immobility.
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Mild thickening of the mid-substance of the radial collateral ligament with a complete avulsion of its proximal attachment site is seen. Adjacent soft tissue edema indicates that this injury is acute.
Proximal interphalangeal joint sesamoiditis of the ring finger is noted.
Bone marrow edema is seen at the head of the ring finger proximal phalanx.
This patient was referred with the history of ring finger proximal interphalangeal joint swelling and immobility following trauma. Regarding the clinical exam and MRI findings, tearing of the radial collateral ligament was diagnosed.