Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
A 20-year-old man had a chondroblastoma of the femoral head treated with our modified trapdoor technique. (A) His coronal CT scan shows a round osteolytic lesion with a thick sclerotic rim. (B) A postoperative radiograph shows the bone defect after curettage is well grafted. (C) The 7-month postoperative radiograph shows the typical appearance of femoral head collapse with signs of osteoarthritic change.
