Table 1: the characteristics features of the two patients with CO in distal tibia compared to our case reported
Case	Age (Years)	Sex	Clinical presentation	Radiology diagnosis	Treatment	Size cm	Follow up
Jerome et al	10	Male	Painful swelling	Codman triangle Sunburst appearance	Sugery and chemotherapy	10.5	2 years: alive and doing his normal daily activities
VandenBussche et al	17	Male	Fracture	Likely osteosarcoma	Sugery and chemotherapy	13.6	4 years: death
Our case	14	Male	Painful swelling	Metaphyseal osteolytic lesion	Sugery and chemotherapy	12	3 years: alive with no recurrence