Chondroblastoma of the patella: a case report / 대한정형외과학회잡지

Tumor and tumor-like lesion of the patella are extremely rare. The following have been reported: giant cell tumor; osteoblastoma; osteoid osteoma; chondroblastoma; solitary osteochon droma; chondroma; ganglion; simple bone cyst; aneurysmal bone cyst; hyperparathyrodism (brown tumor); malignant lymphoma; haemangioendothelioma; haemangima; primary osteosarcoma; plasmocytoma and metastases. Chodroblastoma in patella were very rare and first repoted by Jerone Cohren in 1963. On review of our literatures, we could not find reported case in Korea. The purpose of this paper is to present an unusual case of chondroblastoma of the patella.

MIR Arthrography of the Labral-Capular-Ligamentous Complex : Normal Variations and Pitfalls / 대한정형외과학회잡지

MR arthrography is a useful modality for evaluating the labrocapsular ligamentous complex (LCLC) of the shoulder. This study was performed to describe normal anatomic variations and pitfalls in image interpretation related to evaluation of the LCLC. MR arthrogram of 56 shoulders in 41 asymptomatic young, active, male volunteers were prospectively reviewed to evaluate the labral shapes, capsular insertions and images which may mimic the lesions of glenohumeral instability. The anterior and posterior parts of the labra, respectively, varied in shape: triangular (72%,36%), round (13%,35%), cleaved (8%,1%), notched (2%,0%), flat (5%,24%), and absent (0%,4%). The anterior and posterior capsular insertions, respectively, varied in site: Mosely and Oevergaard type I (82%,62%), type II (13%,36%), and type III (5%2%). A number of pitfalls in image interpretation were discovered. Articular cartilage undercutting the labrum (29%) and middle glenohumoral ligament in proximity to anterior labrum (5%) simulated a labral tear. Joint fluid interposed in the central, superior portion of the sublabral sulci (25%) simulated a SLAP lesion. Synovial fold (38%) in the axillary pouch resembled a loose body. Knowledge of normal variations and pitfalls in MR arthrogram image interpretation of labral-capsular-ligamentous complex will help the orthopedist to accurately detect debilitating derangements associated with the glenohumeral instability.

Ulnar Lengthening in the Treatment of Kienbock's Disease / 대한정형외과학회잡지

Ulnar lengthening, one of the operative treatment methods for Kienbock's disease, is based on the theory that ulnar minus variance is a significant causative factor of Kienbock's disease. It is considered that this method can promote the revascularization of the devascularizied lunate by reducing the forces concentrated at the wrist joint and that over-all carpal collapse is halted or reversed when the ulnar part of the carpus is supported better. 4 patients with Kienbock's disease treated by ulnar lengthening with iliac bone graft were reviewed after follow-up ranging from12 months to 30months. In all of 4 patients, relief of pain was satisfactory and there was no remarkable complication.