Entrapment of extensor pollicis longus, indicis proprius, and digitorum communis tendons in volarly displaced distal radius fracture has been previously reported. However, to the best of our knowledge, the entrapment of extensor carpi radialis brevis and longus tendons has not been reported. Case:We experienced 2 cases of these entrapments. In the first case, the entrapment was identified immediately and treated successfully. In the second case, the entrapment was diagnosed after union when the disturbance of wrist flexion became apparent. Conclusion:When there is a longitudinal fracture line at the vicinity of the second compartment, the entrapment of extensors should be suspected even when acceptable overall alignment is accomplished. Extensor tendon entrapment is one of the complications well-known to be related to Smith-type, or Goyrandtype in French literature, distal radius fractures 1 . In most of the reported cases, the extensor pollicis longus (EPL) tendon was entrapped 2,3 . The extensor indicis proprius (EIP) and extensor digitorum communis (EDC) entrapment was also reported 4,5 . In Galeazzi's fractures, the extensor carpi ulnaris tendon may also be involved 6 . However, intraoperatively confirmed entrapment of the extensor carpi radialis brevis and longus (ECRB, ECRL) tendons has not been previously reported. We report 2 cases of ECR tendon entrapment in volarly displaced distal radius fracture.The patients were informed that data concerning their cases would be submitted for publication, and they provided consent. Case ReportsC ASE 1. A 13-year-old teenage boy fell and injured his left wrist during playing soccer. He was diagnosed as having sustained a distal radius fracture involving the growth plate, consisted of a Salter-Harris type 2 (Fig. 1). Closed reduction was attempted to manipulate the volar displacement but was unsuccessful. Computed tomography revealed a longitudinal fracture line at the dorsoradial aspect of the distal radius, and the ECRB and ECRL tendons were found to be entrapped at the fracture site (Fig. 2). Surgery was performed immediately. The Fig. 1 Case 1. Plain radiographs at the time of injury. Disclosure: The Disclosure of Potential Conflicts of Interest forms are provided with the online version of the article (http://links.lww.com/JBJSCC/B785).

Aneurysmal bone cyst (ABC) is a rare benign cystic lesion of the bone that composes 1-2% of the entire bone tumors. Some are idiopathic, and some occur secondary to other tumors such as giant cell tumor and chondroblastoma. In this article, we report the clinical, radiographic, and histological findings of a secondary ABC following chondroblastoma of the patella with a review of the literature.

Ulnar deviation is a common complication in patients with rheumatoid arthritis (RA). We report a case of an unusual radial deviation of the middle finger caused by an occult intramuscular ganglion of the second interosseous muscle (IOM) in a patient with RA. The resection of the ganglion did not resolve the problem, and the full range of motion of the metacarpophalangeal (MP) joint was achieved through dissection of the tendon of the second dorsal IOM.

Background Previous study demonstrated that distal radioulnar joint (DRUJ) plays a biomechanical role in extension and flexion of the wrist and suggested that fixation of the DRUJ could lead to loss of motion of the wrist. Little is known about the pre- and postoperative range of motion (ROM) after the Sauvé–Kapandji (S-K) and Darrach procedures without tendon rupture. To understand the accurate ROM of the wrist after the S-K and Darrach procedures, enrollment of patients without subcutaneous extensor tendon rupture is needed. Purpose This study aimed to investigate the pre- and postoperative ROM after the S-K and Darrach procedures without subcutaneous extensor tendon rupture in patients with rheumatoid arthritis (RA) and osteoarthritis (OA). Methods This retrospective study included 36 patients who underwent the S-K procedure and 10 patients who underwent the Darrach procedure for distal radioulnar joint disorders without extensor tendon rupture. Pre- and postoperative ROMs after the S-K and Darrach procedures were assessed 1 year after the surgery. Results In the S-K procedure, the mean postoperative ROM of the wrist flexion (40 degrees) was significantly lower than the mean preoperative ROM (49 degrees). In wrist extension, there were no significant differences between the mean preoperative ROM (51 degrees) and postoperative ROM (51 degrees). In the Darrach procedure, the mean postoperative ROM of the wrist flexion and extension increased compared with the mean preoperative ROM; however, there were no significant differences. Conclusion In the S-K procedure, preoperative ROM of the wrist flexion decreased postoperatively. This study provides information about the accurate ROM after the S-K and Darrach procedures. Level of Evidence This is a Level IV, therapeutic study.