A 9 year old boy presenting with lytic lesion on midshaft tibia. On HPE, there are grooved nuclei, giant cells eosinophilic cytoplasm and fibroblastic proliferation. Xray is as shown below. What is the likely diagnosis?

Orthopaedics

A 9 year old boy presenting with lytic lesion on midshaft tibia. On HPE, there are grooved nuclei, giant cells eosinophilic cytoplasm and fibroblastic proliferation. Xray is as shown below. 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 -