The lateral fabella is a sesamoid bone behind the knee which is twice as common in people with knee osteoarthritis. Sesamoids ...

Another cause of posterior knee pain which is not as prevalent but every bit as painful is a sesamoid bone or an accessory bone (extra bone) in the calf musculature at it’s origin behind the knee.

when the knee bends, glides in a concave groove on the femur (the trochlea groove). The patella itself is a sesamoid bone, which is a bone embedded within a tendon. You also have sesamoid bones in ...