Painful compression of SS tendon and subacromial (SA)-subdeltoid (SD) bursa between coracoacromial (CA) arch and humeral head
CA arch
Anterior acromion process
CA ligament
Acromioclavicular (AC) joint
Inferior border of outlet is humeral head
Older individuals
Most commonly diagnosed shoulder disease
IMAGING
General Features
Radiographic Findings
CT Findings
MR Findings
Ultrasonographic Findings
Imaging Recommendations
DIFFERENTIAL DIAGNOSIS
PATHOLOGY
General Features
Staging, Grading, & Classification
Gross Pathologic & Surgical Features
CLINICAL ISSUES
Presentation
Demographics
Natural History & Prognosis
Treatment
DIAGNOSTIC CHECKLIST
Consider
Image Interpretation Pearls
Reporting Tips
Selected References
Sasiponganan C et al: Subacromial impingement anatomy and its association with rotator cuff pathology in women: radiograph and MRI correlation, a retrospective evaluation. Skeletal Radiol. 48(5):781-90, 2019
Gammaitoni AR et al: Predicting response to subacromial Injections and lidocaine/tetracaine patch from pretreatment pain quality in patients with shoulder impingement syndrome. Pain Med. 16(7):1333-40, 2015
Rhon DI et al: Management of the unilateral shoulder impingement syndrome. Ann Intern Med. 162(3):237-8, 2015
Tasaki A et al: Quantitative and qualitative analyses of subacromial impingement by kinematic open MRI. Knee Surg Sports Traumatol Arthrosc. 23(5):1489-97, 2015
Kanatli U et al: The role of radiological subacromial distance measurements in the subacromial impingement syndrome. Eur J Orthop Surg Traumatol. 23(3):317-22, 2013
Tuite MJ: Magnetic resonance imaging of rotator cuff disease and external impingement. Magn Reson Imaging Clin N Am. 20(2):187-200, ix, 2012
Campbell RS et al: External impingement of the shoulder. Semin Musculoskelet Radiol. 12(2):107-26, 2008
Hambly N et al: Rotator cuff impingement: correlation between findings on MRI and outcome after fluoroscopically guided subacromial bursography and steroid injection. AJR Am J Roentgenol. 189(5):1179-84, 2007
Brossmann J et al: Shoulder impingement syndrome: influence of shoulder position on rotator cuff impingement--an anatomic study. AJR Am J Roentgenol. 167(6):1511-5, 1996
Fu FH et al: Shoulder impingement syndrome. A critical review. Clin Orthop Relat Res. (269):162-73, 1991
Seeger LL et al: Shoulder impingement syndrome: MR findings in 53 shoulders. AJR Am J Roentgenol. 150(2):343-7, 1988
Painful compression of SS tendon and subacromial (SA)-subdeltoid (SD) bursa between coracoacromial (CA) arch and humeral head
CA arch
Anterior acromion process
CA ligament
Acromioclavicular (AC) joint
Inferior border of outlet is humeral head
Older individuals
Most commonly diagnosed shoulder disease
IMAGING
General Features
Radiographic Findings
CT Findings
MR Findings
Ultrasonographic Findings
Imaging Recommendations
DIFFERENTIAL DIAGNOSIS
PATHOLOGY
General Features
Staging, Grading, & Classification
Gross Pathologic & Surgical Features
CLINICAL ISSUES
Presentation
Demographics
Natural History & Prognosis
Treatment
DIAGNOSTIC CHECKLIST
Consider
Image Interpretation Pearls
Reporting Tips
Selected References
Sasiponganan C et al: Subacromial impingement anatomy and its association with rotator cuff pathology in women: radiograph and MRI correlation, a retrospective evaluation. Skeletal Radiol. 48(5):781-90, 2019
Gammaitoni AR et al: Predicting response to subacromial Injections and lidocaine/tetracaine patch from pretreatment pain quality in patients with shoulder impingement syndrome. Pain Med. 16(7):1333-40, 2015
Rhon DI et al: Management of the unilateral shoulder impingement syndrome. Ann Intern Med. 162(3):237-8, 2015
Tasaki A et al: Quantitative and qualitative analyses of subacromial impingement by kinematic open MRI. Knee Surg Sports Traumatol Arthrosc. 23(5):1489-97, 2015
Kanatli U et al: The role of radiological subacromial distance measurements in the subacromial impingement syndrome. Eur J Orthop Surg Traumatol. 23(3):317-22, 2013
Tuite MJ: Magnetic resonance imaging of rotator cuff disease and external impingement. Magn Reson Imaging Clin N Am. 20(2):187-200, ix, 2012
Campbell RS et al: External impingement of the shoulder. Semin Musculoskelet Radiol. 12(2):107-26, 2008
Hambly N et al: Rotator cuff impingement: correlation between findings on MRI and outcome after fluoroscopically guided subacromial bursography and steroid injection. AJR Am J Roentgenol. 189(5):1179-84, 2007
Brossmann J et al: Shoulder impingement syndrome: influence of shoulder position on rotator cuff impingement--an anatomic study. AJR Am J Roentgenol. 167(6):1511-5, 1996
Fu FH et al: Shoulder impingement syndrome. A critical review. Clin Orthop Relat Res. (269):162-73, 1991
Seeger LL et al: Shoulder impingement syndrome: MR findings in 53 shoulders. AJR Am J Roentgenol. 150(2):343-7, 1988
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