Operative Treatment of Displaced Medial Epicondyle Fractures Using K-Wires Cross-Fixation / 대한정형외과학회잡지

PURPOSE: The aim of this study was to investigate the clinical and radiological outcomes following reduction of displaced medial humeral epicondyle fracture with a K-wire cross-fixation. MATERIALS AND METHODS: Seventeen patients (mean age, 12.7 years; 12 boys and 5 girls) who underwent cross-fixation using K-wires in displaced medial epicondyle fracture, regardless of dislocation, were included. Surgical outcomes were estimated using the Elbow Assessment Score of the Japanese Orthopaedic Association. Statistical significance between the elbow assessment score and age, fracture type, dislocation, displacement width, and size difference between bilateral medial epicondyles was estimated 6 weeks after surgery. RESULTS: The mean elbow assessment score among the patients was 98 points (range, 94-100 points). Displaced medial epicondyle fractures were radiologically classified according to 3 groups: minimally displaced (2 cases), entrapped (9 cases), and associated with dislocation (6 cases). The mean displacement width of the fracture fragment was 11.6 mm. At 6 weeks postoperatively, the medial length of the distal humerus (28.6 mm) was greater compared to that of the contralateral side (28.1 mm). Displacement of the fracture fragment was statistically related to the elbow assessment score (p=0.011). The other assessed values did not show statistical meaning. CONCLUSION: Open reduction of the displaced medial humeral epicondyle fracture using K-wire cross-fixation in children and adolescents showed favorable clinical results with no instability or elbow complications.

Acute Dorsal Compartment Syndrome of the Forearm in a Patient with Rhabdomyolysis / 대한정형외과학회잡지

There are three compartments of the forearm by fascia: volar, dorsal and lateral. Compartment syndrome of the forearm, which commonly develops in the volar deep compartment, can be induced by various causes. We experienced a case of acute dorsal compartment syndrome of the forearm in a patient with rhabdomyolysis. Because of severe pain and progressive palsy of the posterior interosseous nerve, fasciotomy and release of posterior interosseous nerve were performed. Acute compartment syndrome localized at the dorsal compartment of the forearm is very rare, and compartment syndrome of the forearm in a patient with rhabdomyolysis has not been reported previously. We report the case with review of literatures.

Expression of PSD95 in the Rat Sciatic Nerve

This study was designed to elucidate the existence of PSD95 in the rat sciatic nerve. Immunohistochemical stains of cryosection and teased fiber of sciatic nerves were performed with goat polyclonal antibody against PSD95. Western blot analysis was also accomplished with the same antibody. We got an interesting result that the rat sciatic nerve obviously showed PSD95 immunoreactivity especially in the nodal and paranodal regions, and we also identified a distinct band of PSD95 by western blot. These results suggest PSD95 exists in the sciatic nerve as well as it does in the central nervous system. We suppose PSD95 may have some important roles in ion channel clustering, junctional plasticity and signal transduction in the peripheral nerves as well.