title: Pitfalls in shoulder MRI: part 1--normal anatomy and anatomic variants.
abstract: OBJECTIVE
  The purpose of this article is to review frequently encountered pitfalls as they pertain to normal and variant anatomy of the shoulder, including the rotator cuff and rotator cable, blood vessels, glenoid labrum, and the glenohumeral ligaments.
  
  
  CONCLUSIONS
  MRI is the preferred method for evaluating internal derangement of the shoulder. Radiologists interpreting MR images should have a detailed understanding of pertinent anatomy and knowledge of common and uncommon pitfalls to avoid during image interpretation.
authors.affiliation: 1 All authors: Department of Radiology and Biomedical Imaging, University of California, San Francisco, 505 Parnassus, Ste M392, San Francisco, CA 94143-0628.
authors.forename: Daria
authors.initials: D
authors.lastname: Motamedi
authors.forename: Brian M
authors.initials: BM
authors.lastname: Everist
authors.forename: Scott R
authors.initials: SR
authors.lastname: Mahanty
authors.forename: Lynne S
authors.initials: LS
authors.lastname: Steinbach
mesh_terms: D006801:Humans; D008023:Ligaments, Articular / Q000002:abnormalities* / Q000033:anatomy & histology / Q000473:pathology*; D008279:Magnetic Resonance Imaging / Q000379:methods*; D012016:Reference Values; D012785:Shoulder Joint / Q000002:abnormalities / Q000033:anatomy & histology* / Q000473:pathology*; D013710:Tendons / Q000002:abnormalities* / Q000033:anatomy & histology / Q000473:pathology*
keywords: MRI; anatomic variants; artifacts; pitfalls; shoulder