Document Detail


Acromioclavicular joint cyst formation.
MedLine Citation:
PMID:  20069645     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Acromioclavicular joint (ACJ) cysts are an uncommon and unusual sequela associated with shoulder pathophysiology. The majority of literature on ACJ cysts consists of individual case reports with no definitive literature review currently available. In addition to a comprehensive literature review, four clinical cases are presented in this report. First described by Craig (1984), a total of 41 cases have been previously reported in the literature. Of these cases, five occurred with the rotator cuff musculature intact. The remaining 36 cases of ACJ cysts occurred in patients with a complete tear/avulsion of the rotator cuff. Previous attempts at compiling a complete record of all reported cases have combined several distinct conditions into a single category. This article presents two distinct etiologies for the pathogenesis of ACJ cyst formation. In the presence of an intact rotator cuff, a Type 1 cyst can form superficially and be limited to the ACJ. Following a massive or traumatic tear of the rotator cuff, mechanical instability of the humeral head can cause a deterioration of the inferior acromioclavicular capsule (cuff tear arthropathy) and an overproduction of synovial fluid. Overtime, a "geyser" of fluid can form between the glenohumeral and the ACJ, forming a Type 2 cyst. This differentiation and categorization is essential for appropriate classification and treatment.
Authors:
Andrew D Hiller; Joshua D Miller; John L Zeller
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Publication Detail:
Type:  Journal Article; Review    
Journal Detail:
Title:  Clinical anatomy (New York, N.Y.)     Volume:  23     ISSN:  1098-2353     ISO Abbreviation:  Clin Anat     Publication Date:  2010 Mar 
Date Detail:
Created Date:  2010-02-26     Completed Date:  2010-05-26     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8809128     Medline TA:  Clin Anat     Country:  United States    
Other Details:
Languages:  eng     Pagination:  145-52     Citation Subset:  IM    
Affiliation:
Division of Anatomical Sciences, University of Michigan Medical Center, Ann Arbor, Michigan, USA.
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MeSH Terms
Descriptor/Qualifier:
Acromioclavicular Joint*
Cysts / etiology*
Humans
Joint Diseases / etiology*

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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