Myositis ossifcans - Very rare
or more commonly, the patella (kneecap)
The patella, also known as the kneecap, is a sesamoid bone. Sesamoid bones are bones that are embedded within tendons and provide protection and mechanical advantage to that tendon. The patella is located within the quadriceps tendon and acts as a fulcrum to increase the leverage of the quadriceps muscles during knee extension.
Patella
An enthesophyte is a bone spur near a tendon.
The patellar tendon connects the quadriceps to the tibia bone.
Bone spur
In the knee, the patella is found within the quadriceps tendon. This is the largest sesamoid bone in the human body.
The quadriceps muscle goes over the patella. The patella is encased in the quadriceps tendon. This tendon inserts on the tibia at the tibial tuberosity. Other muscles from the thigh have tendons which go underneath the patella.
Sesamoid bones are also found occasionally at the metacarpophalangeal joints of the middle and ring fingers, at the interphalangeal joint of the thumb and at the distal interphalangeal joint of the index finger. In the lower extremity the largest sesamoid bone of the joints is the patella, developed in the tendon of the Quadriceps femoris.
A bone formed in a tendon. Example are the patella and baculumA sesamoid bone is that bone which is embedded within a tendon. An example is the patella.
Quadriceps femoris group, including rectus femoris, vastus lateralis, vastus medialis, and vastus intermedius.
Achilles tendon, which connects the calf muscle or gastrocnemius to the heel, and the quadriceps tendon, which connects the front thigh muscles to the kneecap (patella).
The patella is the round bone on the anterior of the knee. You can palpate the surface of the knee and you can gently shift the patella bone side to side. The insertion of the patella bone is quadricep ligament which attaches to the proximal end of the tibia. The origin of the patella is the quadricep tendon. The quadriceps consist of four muscles: rectus femoris, vastus intermedius, vastus medialis, and the vastus lateralis.