10 year old boy complaints of pain in right arm near the shoulder, x-ray shows expansile lytic lesion in upper third of humerus, what is the likely diagnosis.

Orthopaedics

10 year old boy complaints of pain in right arm near the shoulder, x-ray shows expansile lytic lesion in upper third of humerus, what is the likely diagnosis.

What is the use of the given instrument:

Which fracture results in the given deformity?

Positive pivot shift test in knee is because of injury to -