X-ray of rotator cuff tear
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Author:
Mikael Häggström [notes 1]
Projectional radiography ("X-ray") can show indirect evidence of signs of rotator cuff tear:
- The humeral head may migrate upwards (high-riding humeral head) secondary to tears of the infraspinatus, or combined tears of the supraspinatus and infraspinatus.[1] The migration can be measured by the distance between:
- A line crossing the center of a line between the superior and inferior rims of the glenoid articular surface (blue in image).
- The center of a "best-fit" circle positioned over the humeral articular surface (green in image)
- Normally, the former is positioned inferiorly to the latter, and a reversal is therefore indicating a rotator cuff tear.[1]
- Calcific tendonitis and shoulder osteoarthritis may indicate long-standing rotator cuff tear, but are unspecific.
Notes
- ↑ For a full list of contributors, see article history. Creators of images are attributed at the image description pages, seen by clicking on the images. See Radlines:Authorship for details.
References
- ↑ 1.0 1.1 1.2 Keener, Jay D; Wei, Anthony S; Kim, H Mike; Steger-May, Karen; Yamaguchi, Ken (2009). "Proximal Humeral Migration in Shoulders with Symptomatic and Asymptomatic Rotator Cuff Tears ". The Journal of Bone and Joint Surgery. American Volume 91 (6): 1405–1413. doi:. ISSN 0021-9355. PMID 19487518.
