Extensor carpi ulnaris tenosynovitis

Case contributed by Utkarsh Kabra
Diagnosis almost certain

Presentation

Pain and swelling at medial aspect of wrist

Patient Data

Age: 35 years
Gender: Female
This study is a stack
Coronal PD
fat sat
This study is a stack
Coronal
T1
This study is a stack
Axial PD
fat sat
This study is a stack
Axial
PD
This study is a stack
Coronal
STIR
This study is a stack
Sagittal
T2
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Info

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.

Case Discussion

Findings reflecting extensor carpi ulnaris tenosynovitis with a possible small partial interstitial tear. These explain the patient's symptoms of swelling and pain.

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