Aggressive curettage of a chondroblastoma-like osteosarcoma of the proximal end of the tibia. A case report with seven-year follow-up.

A chondroblastoma-like osteosarcoma (CLO) in the proximal epiphysis and metaphysis of the tibia in a 30-year-old male is presented. With a wrong diagnosis of chondroblastoma, an aggressive curettage was performed. Later, the patient refused en-bloc resection. Seven years after surgery, there has been no local recurrence, and the patient is living an ordinary and active life. CLO is a very uncommon and controversial histologic subtype of osteosarcoma that can be misdiagnosed as chondroblastoma and therefore incorrectly treated. However, aggressive curettage with its functional advantages could be a reasonable option in selected cases.