Extensor Carpi Ulnaris Tendonitis
synonyms:Extensor Carpi Ulnaris Tendonitis, ECU tendonitis
ECU Tendonitis ICD-9
- 727.05 (other tenosynovitis of hand and wrist)
ECU Tendonitis Etiology / Epidemiology / Natural History
ECU Tendonitis Anatomy
- The ECU is maintained in its groove by the extensor retinaculum, the linea jugata and the ECU subsheath.
- ECU subsheath = 2cm stout fibroosseous tunnel encircling the ECU in the ulnar groove.
- linea jugata = soft tissue band running from the proximal medial border of the ulnar styloid and inserting on the extensor retinaculum.
- In full suppination the ECU is a wrist extensor. In full pronation the ECU produces ulnar deviation.
ECU Tendonitis Clinical Evaluation
- Tenderness along the sixth dorsal compartment / ECU
- Pain increased by resisted ulnar deviation and forced radial deviation.
- Common in rowing and racquet sports
ECU Tendonitis Xray / Diagnositc Tests
- P/A and lateral wrist xrays usually normal.
ECU Tendonitis Classification / Treatment
- Acute: cock-up wrist splint, nsaids, acitivity modification.
- Subacute (patients who have failed acute management): Corticosteriod injection 6th dorsal compartment.
- Chronic (patients who have 2 or more injections): Surgical release can be considered, but associated pathology must be ruled out first. (Kip PC, J Hand Surg 1994;19Am:599)
ECU Tendonitis Associated Injuries / Differential Diagnosis
ECU Tendonitis Complications
- ECU dislocation / subluxation
ECU Tendonitis Follow-up Care
ECU Tendonitis Review References