62-year-old female with pain and stiffness, progressive ring and small finger flexion contracture, possible mechanically locked trigger finger versus other pathology. LIGAMENTS: The ligaments are intact.TENDONS: There is abnormal volar displacement of the flexor tendon of the fourth digit with associated increased STIR signal interposed between the proximal phalanx and the tendon. In addition, at the level of the proximal phalanx there is indistinctness of the flexor tendon with intermediate signal intensity on T1-weighted sequences suggesting at least a partial thickness tear. Further distally however the flexor digitorum superficialis and profundus tendons are visualized and demonstrate normal signal intensity. At the level of the metacarpal there is fluid signal within the tendon sheath of the flexor tendons suggesting tenosynovitis. The remaining flexor tendons of the other digits are intact and appear normal. The extensor tendons are intact and appear normal. BONES: Bone marrow signal intensity is normal. The visualized erosions described on the subsequent radiograph are not well-defined on the current study.ADDITIONAL
Findings are suggestive of at least a partial thickness tear of the flexor tendon of the fourth digit with possible tenosynovitis.