Os acromiale associated with rotator cuff impingement: MR imaging of the shoulder.

Park, Jin Gyoon; Lee, J. K.; Phelps, Carlton T.

doi:10.1148/radiology.193.1.8090902

Cited by 93 publications

(48 citation statements)

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“…The os acromiale is an accessory ossicle between the lateral aspect of the clavicle and the acromial process of the scapula [1,2,17,18,19,20,21]. It has a reported prevalence of 1-15% [2,17,18], may be bilateral in up to 62% of cases [17], and is more frequent in men and black individuals [17].…”

Section: Os Acromialementioning

confidence: 99%

“…It has a reported prevalence of 1-15% [2,17,18], may be bilateral in up to 62% of cases [17], and is more frequent in men and black individuals [17]. It has been traditionally interpreted as an unfused acromial apophysis in the skeletally mature individual [2,18,19], although this has been disputed [17]. The shape and size of the os acromiale may vary, as well as its link with the rest of the acromion, which may be formed by a synovial articulation (Fig.…”

Section: Os Acromialementioning

confidence: 99%

“…The os acromiale is a common incidental radiographic finding in the asymptomatic population [1,2,17,18]; however, it may also associate with subacromial impingement [2,17,18,19,20,21], although a higher prevalence of os acromiale has not been demonstrated in a diseased population [17]. The os acromiale may cause an impingement syndrome in three different ways.…”

Section: Os Acromialementioning

confidence: 99%

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Clinically significant skeletal variations of the shoulder and the wrist: role of MR imaging

et al. 2002

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Several skeletal variations of the upper extremity may cause painful conditions or precipitate early degenerative changes, either spontaneously or in response to overuse and trauma. Magnetic resonance imaging has proved particularly useful for accurate interpretation of many of these clinically significant skeletal variations; however, the widespread use of MR imaging may have contributed to over-emphasizing their clinical importance, which is still controversial in many cases. We review, illustrate, and discuss clinically significant skeletal variations of the upper extremity as seen on MR images, particularly those involving the shoulder and the wrist. In the shoulder region, we evaluate variations of acromial and coracoid processes as well as variations and minor dysplastic deformities of the glenoid fossa. We also review different skeletal variations of the carpal region, including ulnar variance, ulnar styloid, lunate morphology, carpal coalition, and carpal accessory ossicles. The role of MR imaging in assessing the clinical importance of such conditions, whether potential, controversial, or well established, is emphasized in this review.

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Section: Os Acromialementioning

confidence: 99%

Section: Os Acromialementioning

confidence: 99%

Section: Os Acromialementioning

confidence: 99%

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Clinically significant skeletal variations of the shoulder and the wrist: role of MR imaging

et al. 2002

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“…Os acromiale is quite apparent on axial radiographs (Liberson 1937), in CT (Grasso 1992) and MRI (Park et al 1994). Recently, Gumina et al (2003) reported that in most patients with os acromiale the distance of the acromioclavicular AC joint to the anterior edge of the acromion is larger than in a normal population, and described 3 types of relationship between os acromiale and the AC joint.…”

mentioning

confidence: 99%

“…It is usually associated with subacromial impingement (Hutchinson andVeenstra 1993, Jerosch et al 1994) or rotator cuff tears (Mudge et al 1984, Park et al 1994, Boehm et al 2003. Mudge et al (1984) have been the only authors to report the incidence of os acromiale in patients with rotator cuff tears, and found 9 os acromiale in 145 patients (6%).…”

mentioning

confidence: 99%

Rotator cuff tears associated with os acromiale

Boehm¹,

Rolf²,

Martetschlaeger³

et al. 2005

Acta Orthopaedica

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Introduction Os acromiale is a rare anatomical condition; its incidence in cadaver studies has been found to be approximately 8%. In this retrospective study we investigated the incidence and types of os acromiale in patients with rotator cuff tears.Methods We assessed operation notes and axillary radiographs for the presence and the type of os acromiale in 1 000 consecutive patients with open rotator cuff repairs.Results 62 patients (6.2%) showed an os acromiale in the axillary radiographs. In 6 of these the os acromiale was not described in the operation notes. 57 os meso-acromiale and 5 os pre-acromiale were found. The average number of tendons involved in the cuff tear was the same (1.4) in patients with and without os acromiale. The average age of patients with os acromiale was 55 years, and 56 years in patients without os acromiale.Interpretation Os acromiale is a co-condition in patients with rotator cuff tear. The prevalence of os acromiale in patients with rotator cuff tear is similar to that in a standard population with unknown integrity status of the rotator cuff. Thus, it seems debatable whether an os acromiale is a pathological condition leading to rotator cuff tears.

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Scapula

Ward¹

2016

Bergman's Comprehensive Encyclopedia of Human Anatomic Variation

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Os acromiale associated with rotator cuff impingement: MR imaging of the shoulder.

Abstract: Os acromiale can be an important cause of rotator cuff impingement and can be detected with routine MR imaging of the shoulder.

Cited by 93 publications

References 0 publications

Clinically significant skeletal variations of the shoulder and the wrist: role of MR imaging

Clinically significant skeletal variations of the shoulder and the wrist: role of MR imaging

Rotator cuff tears associated with os acromiale

Scapula

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