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Accurate delinea tion of labral lesion is, therefore, key in managing shoul der problems. In a prospective double-blinded fashion, we compared the magnetic resonance imaging findings with those noted at surgery in 33 patients with possible anterior shoulder instability. Of 28 surgically confirmed labral lesions, 21 were detected by imaging. Sensitivity was 75%, specificity 100%, while positive and negative predictive values were 100% and 41%, respectively. Overall accuracy was 79%. Based on a literature review and our clinical experience, we developed a classifica tion of glenoid labra according to the type and severity of the lesions. Method of treatment correlated with clini cal outcome, using this system, to a statistically signifi cant level. Unfortunately, this system enabled accurate classification with magnetic resonance imaging in only 7 of 33 (21 %) labra, with the precision necessary to affect surgical planning in our series. We conclude that magnetic resonance imaging is not useful in the surgical planning for most patients with obvious anterior shoul der instability.<\/jats:p>","DOI":"10.1177\/036354659402200410","type":"journal-article","created":{"date-parts":[[2007,6,21]],"date-time":"2007-06-21T20:46:52Z","timestamp":1182458812000},"page":"493-498","source":"Crossref","is-referenced-by-count":58,"title":["Magnetic Resonance Imaging of the Glenoid Labrum in Anterior Shoulder Instability"],"prefix":"10.1177","volume":"22","author":[{"given":"Michael R.","family":"Green","sequence":"first","affiliation":[{"name":"Division of Orthopaedic Surgery, Tripler Army Medical Center, Honolulu, Hawaii"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Kevin P.","family":"Christensen","sequence":"additional","affiliation":[{"name":"Division of Orthopaedic Surgery, Tripler Army Medical Center, Honolulu, Hawaii"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"179","published-online":{"date-parts":[[1994,7,1]]},"reference":[{"key":"atypb1","doi-asserted-by":"publisher","DOI":"10.3109\/17453678809149424"},{"key":"atypb2","unstructured":"Altchek DW, Skyhar MJ, Warren RF, et al: Shoulder arthroscopy for shoulder instability. 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