An 11 year old boy had pain in the left shoulder.

Case Identification

Case ID Number
Benign or Malignant

Clinical case information

Case presentation

An 11 year old boy had pain in the left shoulder. A left proximal humeral lesion was noted on plain radiographs and CT images, which are shown.

Radiological findings:
A biopsy followed by curettage and packing of the lesion with methylmethacrylate cement was carried out, also shown in the images. The microscopic appearance of the tissue is shown. One year later he again complained of pain, and a repeat CT was performed. The new CT images are shown.
Pathology results:
The microscopic appearance of the tissue is shown.
Treatment Options:
1) What is the diagnosis?

2) What is the cause of the pain that began one year post-operative?

3) What should be done now?
Case Answer
Clinical Case Answer