Why is the fluid into the subacromial subdeltoid bursa the same signal characteristics as the glenohumeral fluid?
Free communication between the two areas due to the full-thickness supraspinatus tear.
Describe your findings
Large juxta-articular erosion in the bare area of the anteromedial humeral head, with smaller similar erosions in the lesser and greater tubercles. Intermediate T2 signal glenohumeral joint effusion which contains tiny bodies, suggestive of synovial hypertrophy. The effusion decompresses into the subacromial subdeltoid bursa due to a near-complete supraspinatus tear, with only a few anterior intact fibres. Mild atrophy of the supraspinatus muscle. Complete loss of the inferior glenohumeral articular cartilage with remodeling of the joint and bone marrow oedema in the anteroinferior glenoid. Mild to moderate ACJ arthropathy, no definite erosions.
Large juxta-articular erosion in the bare area of the anteromedial humeral head, with smaller similar erosions in the lesser and greater tubercles. Intermediate T2 signal glenohumeral joint effusion which contains tiny bodies, suggestive of synovial hypertrophy. The effusion decompresses into the subacromial subdeltoid bursa due to a near-complete supraspinatus tear, with only a few anterior intact fibres. Mild atrophy of the supraspinatus muscle. Complete loss of the inferior glenohumeral articular cartilage with remodeling of the joint and bone marrow oedema in the anteroinferior glenoid. Mild to moderate ACJ arthropathy, no definite erosions.