An 11year old boy presented with the complaints of pain in the right arm near the shoulder. X-ray examination revealed an expansile lytic lesion in the upper third of humerus. The most likely diagnosis is -
Two most important differential diagnosis of expansile lytic lesion in proximal humerus and proximal femur in children are : -


Simple bone cyst (unicameral bone cyst)
Aneurysmal bone cyst


Among these two, only unicameral bone cyst is there in options. Therefore, no further discussion is required.
Giant cell tumor
Unicameral bone cyst
Osteochondroma
Parosteal osteosarcoma