Hooked acromion: prevalence on MR images of painful shoulders.

Abstract

An association between the morphology of the acromion and the occurrence of rotator cuff tear (RCT) has been suggested by findings at both pathologic examination and routine radiography. As a tomographic technique, magnetic resonance (MR) assessment of acromial shape may be more accurate than routine radiography. The authors studied acromial morphology on sagittal oblique MR images of a control population (47 shoulders), of patients with isolated impingement (30 shoulders), and of patients with full-thickness RCTs (34 shoulders) to assess the association of acromial shape with disorders of the rotator cuff. Acromions were classified as flat (type 1), smoothly curved (type 2), or hooked (type 3). Data were collected by two observers, blinded to clinical and surgical information, who acted in consensus. Patients with RCT had a significantly increased prevalence of type 3 acromions compared with control patients (62% vs 13%, P < .001). Type 3 acromions tended to be more prevalent in the group with impingement (30%, P = .17). There was no significant difference in the distribution of acromion types among control patients with respect to age or gender.

What Imaging‐Detected Pathologies Are Associated With Shoulder Symptoms and Their Persistence? A Systematic Literature Review

“…Those with full‐thickness cuff tears had an increased prevalence of type 3 acromion compared to controls and patients with surgical impingement 47. No relationship existed between scapuloacromial angle 57, subacromial distance, or acromion shape 62 and impingement.…”

“…In total, 56 articles were included (41 cross‐sectional, 11 cohort, 4 case–control). Imaging modalities included 25 ultrasound 16, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 24 MRI 15, 16, 41, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 12 radiographs 27, 30, 49, 53, 55, 62, 65, 66, 67, 68, 69, 70, 3 bone scintigraphy 65, 71, 72, 2 PET 73, 74, and no computed tomography. Of these studies, 10 assessed associations with 2 imaging modalities (16, 27, 30, 41, …”

“…The mean (range) score was 48% 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67 for cohort, 41% 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41...…”

“…Twelve studies (23, 27, 34, 46, 47, 50, 53, 55, 56, 57, 62, 68) evaluated the relationship between the acromion and symptoms (Tables 1, 2, and 3). Two ultrasound studies 23, 34, 3 MRI studies 47, 50, 57, 1 radiographic study 68, 2 combined MRI and radiographic studies 53, 62 and 1 combined ultrasound and radiographic study 27 evaluated the relationship of the acromion and pain.…”

“…Two ultrasound studies 23, 34, 3 MRI studies 47, 50, 57, 1 radiographic study 68, 2 combined MRI and radiographic studies 53, 62 and 1 combined ultrasound and radiographic study 27 evaluated the relationship of the acromion and pain. One study radiographically evaluated the relationship with function 68.…”