Ramu, an 8-year old boy presented with pain in the arm. On x-ray, his upper end of humerus demonstrates an expansile lesion in the metaphysis with breach of the overlying cortex. Most likely diagnosis is –

Orthopaedics

Ramu, an 8-year old boy presented with pain in the arm. On x-ray, his upper end of humerus demonstrates an expansile lesion in the metaphysis with breach of the overlying cortex. Most likely diagnosis is –

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 -