Extensor carpi ulnaris tenosynovitis

Significant fluid along extensor carpi ulnaris tendon with distension of its sheath and areas of synovial thickening, involving a length of approx. 55 mm starting from the distal forearm up to its insertion at the base of the fifth metacarpal.

Mild thickening and hyperintensity involving extensor carpi ulnar tendon is also seen with possible small partial interstitial tear involving approx. 5 mm long segment near its insertion.

Significant radiocarpal joint effusion is seen with areas of synovial thickening.

TFCC: Partial tears of foveal attachment of triangular fibrocartilage is seen with low to intermediate grade sprain of styloid attachment and associated small erosions, mild marrow edema in distal ulna. Sprain of dorsal and volar radioulnar ligaments is seen with possible partial tears of ulnar attachment. Partial tears of ulnomeniscal homologue are also seen.