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Hill-Sachs Lesion on MR Arthrography of the Shoulder: Relationship with Bankart Lesion on Arthroscopy and Frequency of Shoulder Dislocations  

Kim, Ji Na (Department of Radiology, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine)
Lee, Min Hee (Department of Radiology, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine)
Ahn, Joong Mo (Department of Radiology, University of Pittsburgh Medical Center)
Publication Information
Investigative Magnetic Resonance Imaging / v.17, no.1, 2013 , pp. 26-32 More about this Journal
Abstract
Purpose : This study was performed to evaluate the presence and severity of Hill-Sachs (HS) lesions on MR arthrography (MRA) of shoulder in patients with Bankart lesions following anterior dislocation and to investigate their relationship with Bankart lesions and frequency of dislocations. Materials and Methods: 86 MRA of shoulder were evaluated in patients with arthroscopic Bankart repairs following anterior dislocations. The largest surface length of HS lesion on MRA and extent of Bankart lesions on arthroscopy were measured. Relationships between length of HS lesions and extent of Bankart lesions and frequency of dislocations were assessed. Results: HS lesions were identified on MRA in 78 patients. The largest surface length of HS lesion ranged from 9.3 mm to 29.6 mm (mean, 18.8 mm). The extent of Bankart lesion ranged from one to six o'clock extent (mean, 4.25 o'clock extent). Three patients had single dislocation and the other 75 patients had recurrent dislocations (mean 24.5 times). The largest surface length of HS lesions was positively correlated with extent of Bankart lesions (p = 0.001, r = 0.37), but not with frequency of dislocation. Conclusion: HS lesion was very common in patients with Bankart lesion. The severity of HS lesions was correlated with extent of Bankart lesions.
Keywords
Shoulder; MR arthrography; Trauma; Hill-Sachs lesion; Bankart lesion;
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