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Part 1: Question
A 56-year-old previously well left-handed woman presents to her family physician with a 2-year history of pain and stiffness in her left shoulder. She describes a constant ‘ache’ that became ‘sharp’ when playing tennis or golf. Over the last 2 months, the pain has become increasingly worse and she has had to reduce her tennis matches from four times per week to only once.
On examination, there was a soft tissue swelling over the left shoulder with no bruising or muscle wasting. Her pain reproduced with active abduction of the left shoulder while the passive range of motion was full. There was reduced power with abduction and flexion of the shoulder. Sensation was intact in the upper extremity.
Plain films and an ultrasound examination were performed (figures 1 and 2).
What is the most likely diagnosis?
For answer see page 1135
For question see page 1079
Part 2: Answer
Shoulder pain is a frequent complaint among patients and diagnosing the cause can be challenging, often requiring imaging studies. As the first-line modality, plain radiography should be ordered for all patients with pain persisting beyond 6 weeks.1 The differential diagnosis for this middle-aged female patient with atraumatic shoulder pain includes arthritis and rotator cuff pathology. However, before considering these more common causes, it is important to exclude infection and malignancy.
Septic arthritis is …
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