FINDINGS: A large lobulated chondroid lesion (predominantly of high signal intensity on T2 and predominantly of low signal intensity on T1-weighted images), measuring 7 x 9 x 10 cm, arises from the anterior scapula and glenoid. High T2 signal intensity, suspicious of the partial encasement/invasion is around the proximal subclavian artery and brachial plexus. Diffuse oedematous changes in the supraspinatus muscle and no clear fat plane between the lesion and supraspinatus, subscapularis & anterolateral upper chest wall muscles are noted; these features are suspicious of invasion of these muscles by the lesion.
OPINION: Large lobulated chondroid matrix mass lesion of the left scapula. MR imaging features in correlation with the plain radiograph are in keeping with chondrosarcoma.