Incidence of familial tendon dysfunction in patients with full-thickness rotator cuff tears.

Yamaguchi et al evaluated 586 patients who had a diagnostic shoulder ultrasound for shoulder pain and found a strong trend of reported family history of rotator cuff tearing in individuals with a rotator cuff tear compared to those without a tear (10.9% versus 6.9%, P =0.06). 4 Harvie et al retrospectively evaluated the 129 siblings of a cohort of 205 patients diagnosed with full-thickness rotator cuff tears by ultrasound to identify the prevalence of rotator cuff tearing in this sibling population. 5 They determined that siblings of patients with full-thickness rotator cuff tears had an increased relative risk for tearing compared to controls.

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