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Rotator cuff
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===Inflammation and fibrosis=== The rotator interval is a triangular space in the shoulder that is functionally reinforced externally by the [[coracohumeral ligament]] and internally by the [[glenohumeral ligament|superior glenohumeral ligament]], and traversed by the intra-articular [[biceps tendon]]. On imaging, it is defined by the coracoid process at its base, the supraspinatus tendon superiorly and the subscapularis tendon inferiorly. Changes of [[adhesive capsulitis]] can be seen at this interval as [[edema]] and [[fibrosis]]. Pathology at the interval is also associated with glenohumeral and biceps instability.<ref>{{cite journal|last1=Petchprapa|first1=CN|last2=Beltran|first2=LS|last3=Jazrawi|first3=LM|last4=Kwon|first4=YW|last5=Babb|first5=JS|last6=Recht|first6=MP|title=The rotator interval: a review of anatomy, function, and normal and abnormal MRI appearance.|journal=AJR. American Journal of Roentgenology|date=September 2010|volume=195|issue=3|pages=567β76|pmid=20729432|doi=10.2214/ajr.10.4406}}</ref> Adhesive capsulitis or "frozen shoulder" is often secondary to rotator cuff injury due to post-surgical immobilization. Available treatment options include intra-articular corticosteroid injections to relieve pain in the short-term and electrotherapy, mobilizations, and home exercise programs for long-term pain relief. <ref>Challoumas D, Biddle M, McLean M, Millar NL. Comparison of Treatments for Frozen Shoulder: A Systematic Review and Meta-analysis. JAMA Netw Open. 2020;3(12):e2029581. Published 2020 Dec 1. [http://doi:10.1001/jamanetworkopen.2020.29581 doi:10.1001/jamanetworkopen.2020.29581]{{Dead link|date=February 2023 |bot=InternetArchiveBot |fix-attempted=yes }}</ref>
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