What Is a Subchondral Bone Cyst? It's a fluid-filled sac that forms in one or both of the bones that make up a joint. They're especially common at the knee or hip. The cysts show up just under the ...

Your femur connects many important muscles, tendons, and ligaments in your hips and knees to the other parts of your body, including parts of the circulatory system. More than that, it helps you carry ...

The femur — your thigh bone — is the largest and strongest bone in your body. When the femur breaks, it takes a long time to heal. Breaking your femur can make everyday tasks much more difficult ...