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  • Title: [Subacromial impingement syndrome and rotator cuff tear. Ultrasonography of 140 cases].
    Author: Malvestiti O, Mariani C, Scorsolini A, Ratti F, Ferraris G, Columbaro G.
    Journal: Radiol Med; 1997; 94(1-2):37-42. PubMed ID: 9424648.
    Abstract:
    We investigated the role of rotator cuff impingement in causing tears of supraspinatus and biceps tendons and the comparative reliability of plain radiography and sonography (US). One hundred forty patients with symptoms referrable to the rotator cuff were examined with plain radiography and US of the shoulder. US findings were correlated with MR or double contrast arthrography results in 10 patients and 39 patients were submitted to surgery (acromionplasty). Radiographic studies were performed first and diagnosed rotator cuff impingement (63 patients) caused by abnormal acromial margins or size (23 patients), by acromioclavicular joint protrusion (17 patients), by anterior acromial osteophytosis (10 patients), or by massive periarthritic calcifications (13 patients). In the same 140 patients. US showed normal cuffs in 46 cases, tendonitis in 34, calcific tendonitis in 13, partial-thickness cuff tears in 13, full-thickness cuff tears in 20 and biceps tendon tears in 14 cases. Six of 13 partial tears were studied with MRI, with 4 true positives and 2 false positives. US diagnosis was confirmed by arthrography in 4 complete tears. Twenty-nine of 39 patients undergoing acromionplasty were examined only with plain radiography and US. US accurately diagnosed all 20 massive full-thickness tears, with no false positives nor false negatives (US versus surgery and arthrography). Eleven true positives, 2 false positives and no false negative were observed in 13 partial-thickness cuff tears (US versus surgery and MRI). These findings suggest that rotator cuff US and plain radiography are easily performed, reproducible routine examinations to study the whole rotator cuff and the acromioclavicular joint in the many patients who need an accurate, safe, painless, rapid and cost-effective differential diagnosis, leaving it up to the surgeon to consider MRI or arthrography. Rotator cuff impingement tendonitis, overuse or calcific tendonitis, partial-thickness cuff tears and full-thickness tears ranging from light to severe cause similar shoulder pain and weakness on arm raising. The differential diagnosis must distinguish all these common causes of shoulder dysfunction and cuff problems from other conditions. We conclude that US and plain radiography are accurate routine tests of rotator cuff integrity and rotator cuff impingement.
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