An unusual case of shoulder pain.

Shoulder pain is a common musculoskeletal ailment. The process of determining the etiology of shoulder pain can be difficult. The differential diagnoses include: both intracapsular and extracapsular lesions; and neurologic, vascular, postural, and visceral causes. We present an unusual case of shoulder pain accompanied by loss of shoulder range of motion (ROM), initially thought to be caused by an intrinsic shoulder disorder. However, it ultimately was determined that a cervical radicular disorder caused both the impaired ROM and the patient's shoulder pain.