A 10 year old boy with pain in the left clavicle

Case Identification

Case ID Number
Position within the bone
Benign or Malignant

Clinical case information

Case presentation

A 10 year old male had pain in the left shoulder for six months. An initial radiograph was interpreted as showing a non-displaced fracture. A slight fever was noticed which diminished after treatment with antibiotics.

Radiological findings:
The initial radiograph was interpreted as showing a non-displaced fracture. After the symptoms continued, a new radiograph was performed, which showed marked changes in the left clavicle.
Laboratory results:
On admission the patient's temperature ws 37.5°C. His WBC was 8.5 (4.5 - 9.5) with a normal differential. His electrolytes and liver function tests were normal, and the alkaline phosphatase was 738 (up to 740). The erythrocyte sedimentation rate was 52 (up to 15) and the protein C was 0.72 (up to 0.5).

On examination his clavicle was enlarged and slightly tender. There were no neurovascular or cutaneous abnormalities. The motion of the left upper extremity was unimpaired.
Differential Diagnosis
Construct a differential diagnosis that has at least three entities; including a benign tumor, a malignant tumor, and a non-tumorous condition.
Case Answer
Clinical Case Answer