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Clinical Images  |   August 2015
Little League Shoulder
Author Notes
  • From Rocky Mountain Orthopaedic Associates (Dr Reeder); and SOAR Physical Therapy (Mr Smith) in Grand Junction, Colorado. 
  •  *Address correspondence to Michael T. Reeder, DO, Rocky Mountain Orthopaedic Associates, 627 25 1/2 Rd, Grand Junction, CO 81505-6401. E-mail: mtreeder14@gmail.com
     
Article Information
Imaging / Neuromusculoskeletal Disorders / Clinical Images
Clinical Images   |   August 2015
Little League Shoulder
The Journal of the American Osteopathic Association, August 2015, Vol. 115, 522. doi:10.7556/jaoa.2015.108
The Journal of the American Osteopathic Association, August 2015, Vol. 115, 522. doi:10.7556/jaoa.2015.108
A 13-year-old male baseball player presented with severe proximal humerus pain and limited range of motion. Two months previously after pitching 2 weeks into the season, vague, lateral right shoulder pain developed. He stated that at the time he had full range of motion, with end-range pain, normal strength, and no instability. He continued playing outfield and, after 6 weeks, he felt a sudden pain and pop in his shoulder while throwing. 
Radiographs revealed a Salter-Harris II fracture of the proximal humerus, with widening of the lateral physis (image A). Magnetic resonance imaging of the shoulder (image B) revealed a sub-acute Salter-Harris II fracture of the proximal humerus, with periosteal fluid and associated marrow edema. The initial treatment was rest followed by rehabilitation, including thoracic mobilization. The patient then progressed through a regimented throwing program. 
“Little league shoulder” is caused by repeated overhead throwing in athletes between the ages of 11 and 14 years during peak proximal physis growth.1,2 The rotational torque during maximum external rotation when throwing overhead seems to be the primary cause of growth plate failure.1-3 
References
Osbahr DC, Kim HJ, Dugas JR. Little league shoulder [review]. Curr Opin Pediatr. 2010; 22(1): 35-40. doi:10.1097/MOP.0b013e328334584c. [CrossRef] [PubMed]
Zaremski JL, Krabak BJ. Shoulder injuries in the skeletally immature baseball pitcher and recommendations for the prevention of injury. PM R. 2012; 4(7): 509-516. doi:10.1016/j.pmrj.2012.04.005. [CrossRef] [PubMed]
Sabick MB, Kim YK, Torry MR, Keirns MA, Hawkins RJ. Biomechanics of the shoulder in youth baseball pitchers: implications for the development of proximal humeral epiphysiolysis and humeral retrotorsion. Am J Sports Med. 2005; 33(11): 1716-1722. [CrossRef] [PubMed]