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 Radiographs of a 41-year-old woman with advanced osteoarthritis show narrowing of the joint space, femoral head deformity, and femoral head cyst. b Widening of the joint space and a decrease in the size of the cyst at 15 years after surgery
