Purpose: With increased sports participation and medical community awareness, there appears to be an increase in pediatric musculoskeletal injuries. Our purpose was to identify the intra-articular injury pattern seen within the pediatric shoulder.
Methods: A retrospective review was performed at two tertiary-care children's hospitals between 2008 and 2011 on all patients who underwent magnetic resonance imaging (MRI) and subsequent shoulder arthroscopy. Exclusion criteria included: girls >14 years old and boys >16 years old. Demographics, MRI and arthroscopic findings were recorded. Labral pathology was grouped: Zone I (Bankart lesions, 3-6 o'clock for right shoulder), Zone II (posterior labral lesions, 6-11 o'clock), Zone III (SLAP lesions, 11-1 o'clock), and Zone IV (anatomic variants, 1-3 o'clock).
Results: One hundred and fifteen children met criteria, mean age 14.4 years (range 8-16). There were 24 girls and 91 boys, with 70 right shoulders. Of 108 children, labral pathology involved: 72 Zone I (16 isolated anterior), 56 Zone II (15 isolated posterior), 38 Zone III (four isolated superior), and three had an isolated Buford complex. Seventy had more than one labral zone injured, and 31 (30 %) had more than two zones injured. Non-labral pathology included partial rotator cuff tears and humeral avulsions of the glenohumeral ligament.
Conclusion: With 94 % of intra-articular pathology being labral tears, the distribution of proportion in children differs from adults; moreover, 23 % involved only the posterior or posterosuperior labrum. Treating surgeons should be prepared to find anterior tears extending beyond the zone of a classic Bankart lesion and an association with C rotator cuff tears.