Subluxation of the Extensor Carpi Ulnaris Tendon Associated with the Extensor Digitorum Tendon Subluxation of the Long Finger

Abstract

A twenty-year-old male visited our clinic with wrist and long finger metacarpophalangeal (MP) joint pain. Dynamic ultrasonography revealed sagittal band (SB) ulnar subluxation and extensor carpi ulnaris (ECU) volar subluxation. Magnetic resonance imaging showed longitudinal splitting and dislocation of the volar half slip of the ECU tendon. The redundant radial SB was augmented and ECU sheath was advanced to the periosteum using suture anchors. He was able to perform his previous activities at the last follow-up. We encountered a case of "simulateous" ECU dislocation with extensor tendon subluxation of the long finger at the MP joint. Therefore, we report this case with a review of the relevant literature.

Assessment and Treatment of Extensor Carpi Ulnaris Tendon Pathology

“…Although the average forearm and wrist range of motion increased significantly following reconstruction (p , 0.04), the clinical importance was minimal, as the increase was a mere 3°or 4°in all measures 18,19 . A similar technique was used by Kim et al in a case study 31 . This technique has been criticized because, in combination with suture anchors, the ulnar wall of the groove is weakened, putting the repair at risk for failure 2 .…”