Finger swelling and pain Just volar to the PIP joint of the middle finger is a well-defined cystic lesion measuring 1.2 x 1.3 x 0.7 cm in the greatest craniocaudal, transverse, and AP dimensions. This lesion is hyperintense on T2 sequences, hypointense on T1 sequences, and demonstrates no significant central or solid enhancement. There is a large amount of immediate surrounding soft tissue edema largely overlying the volar tissues of the middle finger. There is mildly increased signal and thickening of the flexor digitorum tendons of the middle finger and a small amount of fluid also surrounds the tendon with fibers that are otherwise intact. A trace amount of fluid also surrounds the flexor tendons of the ring finger.The marrow signal of the hand is normal without abnormality, specifically no evidence of fracture or bony destruction.
1. Tenosynovitis of the flexor digitorum tendons of the middle finger.2. Cystic lesion volar to the PIP joint of the middle finger most likely represents a small ganglion cyst.