system
Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
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 -
assistant
The correct answer 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.