Reason: Thumb-CMC and MCP pain-possible UCL injury History: pain and injury There is a tear of the ulnar collateral ligament from its attachment to the base of the proximal phalanx of the thumb. There is mass-like low signal intensity along the ulnar aspect of the first metatarsal head, underlying the adductor aponeurosis, suggestive of a Stener lesion. There is mild edema within the surrounding soft tissues about the first MTP joint as well as a small amount of fluid within the joint. The proximal phalanx of the thumb appears to be slightly volarly subluxed. The radial collateral ligament appears intact. The basilar joint is normal. There is a small cyst within the capitate which is probably of no clinical significance.
Ulnar collateral ligament tear with probable Stener lesion.