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16.05.2020 | Original Article

Anatomical variations of the acromial and coracoid process: clinical relevance

verfasst von: Uriel Alfaro-Gomez, Luis Donaldo Fuentes-Ramirez, Karla Ivonne Chavez-Blanco, Jose Felix Vilchez-Cavazos, Matthew J. Zdilla, Rodrigo E. Elizondo-Omana, Jesus Dante Guerra-Leal, Guillermo Elizondo-Riojas, Ricardo Pinales-Razo, Santos Guzman-Lopez, Alejandro Quiroga-Garza

Erschienen in: Surgical and Radiologic Anatomy | Ausgabe 8/2020

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Abstract

Purpose

The acromial and coracoid process morphology is of clinical relevance due to associations with functional limitations and shoulder pathology. Our objective was to describe the anatomical characteristics of the acromial and coracoid process using computed tomography (CT).

Methods

Descriptive, observational, transversal and retrospective study. A total of 155 CT of patients without shoulder pathology, of both genders, and indistinct age were evaluated and grouped by age: Group 1 < 25 years; group 2 25–40 years; group 3 > 40 years. The following parameters were evaluated: Acromial type (AcT), vertical coracoid distance (VCD), acromial tilt (AT), acromial projection (AP), critical shoulder angle (CSA), type of the subcoracoid outlet (TSO), and the area of the subcoracoid outlet (ASO).

Results

Statistically significant differences were found between men and women for VCD (14.44 ± 4.79 vs. 11.76 ± 4.00 mm; p < 0.001) and AP (3.66 ± 4.71 vs. 1.62 ± 4.99 mm; p < 0.05) as well as between age groups 1 and 3 for AT (35.08 ± 11.53 vs. 28.41 ± 6.60; p < 0.05) and ASO (398.99 ± 153.91 vs. 255.56 ± 124.58 mm²; p < 0.001). An unexpected high ASO variation was identified with 11% of S-shaped acromion and 1.3% clock-shaped TSO.

Conclusion

The age group between 25–40 years had the most uniform distribution of data. There is a high morphological variability present in an asymptomatic population, which should be considered in the clinical assessment such as shoulder impingement syndrome.

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Titel: Anatomical variations of the acromial and coracoid process: clinical relevance
verfasst von: Uriel Alfaro-Gomez
Luis Donaldo Fuentes-Ramirez
Karla Ivonne Chavez-Blanco
Jose Felix Vilchez-Cavazos
Matthew J. Zdilla
Rodrigo E. Elizondo-Omana
Jesus Dante Guerra-Leal
Guillermo Elizondo-Riojas
Ricardo Pinales-Razo
Santos Guzman-Lopez
Alejandro Quiroga-Garza
Publikationsdatum: 16.05.2020
Verlag: Springer Paris
Erschienen in: Surgical and Radiologic Anatomy / Ausgabe 8/2020
Print ISSN: 0930-1038
Elektronische ISSN: 1279-8517
DOI: https://doi.org/10.1007/s00276-020-02497-5

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Anatomical variations of the acromial and coracoid process: clinical relevance