Dataset Information

The incidence of deltoid tear among patients with full-thickness rotator cuff tear

ABSTRACT:

Backgroun

Full-thickness rotator cuff tear is common in the older population. The incidence of traumatic deltoid tears post-surgery is well addressed. However, non-traumatic spontaneous injury is not well recognized despite a few case reports and previous studies. The aim of the study is to determine the incidence and association of deltoid tear among patients with non-traumatic full-thickness rotator cuff tear using shoulder magnetic resonance imaging.

Methods

A retrospective cross-sectional study was conducted of 271 shoulders magnetic resonance imaging examinations with full-thickness rotator cuff tear between 2012 and 2022. The analyzed variables were full-thickness rotator cuff tear size, tear grading (small, medium, large, and massive), muscle fatty degeneration, and deltoid tear. Acromio-humeral interval was also recorded and analyzed on the anteroposterior projection of shoulder radiographs.

Results

The incidence of deltoid tear was 7% (19 cases), encountered in eleven females (6.4%) and eight males (8%) with a mean age of 65 years. Deltoid tears were located on the right side in fifteen patients (9.4%) and on the left side in four patients (3.6%). The Man-Whitney U test indicated a significant association between deltoid tears and full-thickness rotator cuff tear, P < 0.001. The deltoid tear was more notably associated with large and massive full-thickness rotator cuff tear (16.7% and 42.3%, respectively), P < 0.001. Acromio-humeral interval showed a significant difference between the deltoid and non-deltoid cases, P = 0.045.

Conclusion

The incidence and association of deltoid tears with full-thickness rotator cuff tear with no prior surgical intervention or traumatic insults were considered significant, with a positive impact of large and massive tear size and association of muscle fatty degeneration. This association is statistically significant and should be adequately evaluated by the radiologist. Highlights • Full-thickness rotator cuff tear is common in the older population.• Non-traumatic spontaneous injury is not well addressed in the literature.• The incidence of non-traumatic spontaneous injury of deltoid muscle reached almost 7%.• There is a strong association between deltoid tears and the size of rotator cuff tears and tendon retraction.• The middle segment of the deltoid muscle was the most common location of the tears.

SUBMITTER: Alharbi A

PROVIDER: S-EPMC9577534 | biostudies-literature | 2022 Sep

REPOSITORIES: biostudies-literature

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