,There is a persistent os acromiale, and there is minimal reactive marrow edema on both sides of the synchondrosis, suggesting that there may be instability (axial images #3 and 4). 
,There is a persistent os acromiale , and there is minimal reactive marrow edema on both sides of the synchondrosis , suggesting that there may be instability ( axial images # 3 and 4 ) .