Meniscoid-type SuperrJior Labrum Associated with Internal Derangement of Shoulder Joint

견관절내 병변과 동반된 상부관절순의 반월상변형

Glenoid labrum acts as one of static stabilizer of the glenohumeral joint. It deepens the glenoid socket and may also serve as a chock, acting as a wedge in preventing glenohumeral translation. Two types of variations in labral anatomy were noted by Detrisac and Johnson. Type A has a superior labrum that is detached centrally but well attached peripherally. The type B labrum is well attached centrally and peripherally at all sites. A meniscoid-type labrum is thought to be normal unless there are splits or fragmentation of the overlying labral tissue. Meniscoid type labrum is different from SLAP II lesion in that it has a firm anchoring on the superior labrum. We observed four cases that had a meniscoid variant superior labrum, which covered the superior glenoid unusually larger than normal in the arthroscopic treatment of shoulder pathology including instability and rotator cuff diseases. We did arthroscopic reshaping and debridement of meniscoid variant superior labrum combined with pathologic change of the glenohumeral joint. Further study would be required for understanding the mechanism of the development of meniscoid variant labrum and its clinical significance.

견관절의 병변에 대해 관절경적 검사 및 치료를 시행한 50례의 환자중 상부 관절순이 관절와를 비정상적으로 넓게 덮고 있는 meniscoid variant 변형을 4례에서 볼 수 있었으며 이는 SLAPⅡ 병변과는 다르게 관절와부위에 견고히 부착되어 있었다. Meniscoid type의 상부관절순은 .기본적으로 정상적인 변형이지만 반복된 기상운동을 통해 상부 관절순이 과운동성을 갖게 되면 이차적인 변형 및 증상을 유발할 수 있으므로, 저자들은 이에 대해 변연절제 및 재조절을 다른 병변의 치료와 함께 시행하였다. 향후 meniscoid variant변형에 대한 생역학적인 연구와 임상적 의의 그리고 동반된 관절내 병변과의 관계에 대한 연구가 필요할 것으로 생각되었다