Subacromial-subdeltoid bursa
Citation, DOI, disclosures and article data
At the time the article was created Jeremy Jones had no recorded disclosures.
View Jeremy Jones's current disclosuresAt the time the article was last revised Joshua Yap had no financial relationships to ineligible companies to disclose.
View Joshua Yap's current disclosures- SA-SD bursa
- SA-SDB
- Subacromial bursa
- SASD bursa
The subacromial-subdeltoid bursa (SASD), also simply known as the subacromial bursa, is a bursa within the shoulder that is simply a potential space in normal individuals.
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Gross anatomy
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found deep to the deltoid muscle and the coraco-acromial arch
medially in close relation to the acromio-clavicular joint
the mid-point of the bursa commonly corresponds to the most anterior extent of the acromion
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extends laterally over the greater tubercle of the humerus, terminating in its sub-deltoid reflection an average of 4 cm from the mid-point of the acromion
this osseous landmark also corresponds to the posterior bursal reflection
envelops the bicipital groove as it extends inferiorly
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superficial anatomic relations include the rotator interval and the supraspinatus tendon
invested by parallel layers of peri-bursal fat
relationship with supraspinatus tendon consistent, whereas it may or may not interface with the infraspinatus
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anatomically discontinuous with the gleno-humeral joint
communication may occur in the presence of rotator cuff pathology
Radiographic features
Ultrasound
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the hyperechoic peri-bursal fat forms a prominent interface between the deltoid and/or acromion and the underlying supraspinatus allowing identification of the potential space representing the bursa
anechoic fluid may interpose between the layers of peri-bursal fat forming a tri-laminar interface
bursal thickness is typically less than 1 mm in the presence of physiologic amounts of bursal fluid
color flow Doppler examination should reveal an absence of bursal vascularity
dynamic visualization during shoulder abduction and adduction should demonstrate smooth translocation of the bursal reflection beneath the acromion
Related pathology
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bursitis
septic bursitis
rheumatoid arthritis
Quiz questions
References
- 1. Hirji Z, Hunjun JS, Choudur HN. Imaging of the bursae. J Clin Imaging Sci. 2011;1 (1): 22. doi:10.4103/2156-7514.80374 - Free text at pubmed - Pubmed citation
- 2. Beals T, Harryman D, Lazarus M. Useful Boundaries of the Subacromial Bursa. Arthroscopy. 1998;14(5):465-70. doi:10.1016/s0749-8063(98)70073-8 - Pubmed
- 3. Messina C, Banfi G, Orlandi D et al. Ultrasound-Guided Interventional Procedures Around the Shoulder. BJR. 2016;89(1057):20150372. doi:10.1259/bjr.20150372 - Pubmed
- 4. Pourcho A, Colio S, Hall M. Ultrasound-Guided Interventional Procedures About the Shoulder. Phys Med Rehabil Clin N Am. 2016;27(3):555-72. doi:10.1016/j.pmr.2016.04.001 - Pubmed
Incoming Links
- Calcific tendinitis
- Bursa
- Shoulder injury related to vaccine administration
- Ultrasound of the shoulder
- Shoulder
- Coracoacromial ligament
- Subacromial impingement
- Shoulder bursae
- Medical abbreviations and acronyms (S)
- Fosbury flop tear of the rotator cuff
- Subacromial-subdeltoid bursitis
- Acromion
- Glenohumeral joint
- Full-thickness rotator cuff tear
- Geyser sign (shoulder)
- Partial-thickness rotator cuff tear
- Coracoacromial arch
- Subcoracoid bursa
- Bursal-sided rotator cuff tear
- Adhesive capsulitis of the shoulder
- Migration of supraspinatus tendon calcification
- Hydroxyapatite deposition disease
- Subacromial-subdeltoid bursal rupture
- Proximal humerus fracture
- Shoulder bursa (Gray's illustration)
- Anterior labroligamentous periosteal sleeve avulsion lesion (ALPSA)
- Iatrogenic injury of the spinal accessory nerve
- Subscapularis tendon tear
- Acromioclavicular joint injury with muscle injuries (ultrasound)
- Suprascapular neuropathy
- Full-thickness rotator cuff tear
- Subacromial subdeltoid bursa injection (ultrasound-guided)
- Subacromial-subdeltoid bursitis with rotator cuff tears
- Bifid biceps tendon
- Partial supraspinatus tear wih subacromial impingement
- Subacromial impingement
- Bony Bankart injury with Hill-Sachs
- Bifid biceps tendon
- Impingement syndrome with supraspinatus tendinopathy and atrophy
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