28-year-old male with pain. Evaluate for ulnar collateral ligament tear. LIGAMENTS: There is thinning and increased signal abnormality consistent with partial thickness tearing of the distal undersurface fibers of the ulnar collateral ligament at the level of its insertion on the base of the proximal phalanx of the thumb, which appears to remain deep to the adductor pollicis tendon/muscle. There is no evidence of significant retraction or medialization of the proximal tendon fragments to suggest a Stener lesion. TENDONS: The imaged flexor and extensor tendons of the thumb are normal in appearance. BONES: No bone marrow signal abnormality is identified. ADDITIONAL
Partial thickness tearing of the ulnar collateral ligament without evidence to suggest a Stener lesion as described above. 