Bursa of the knee joint

The bursae near the knee-joint are the following:

Frontal
In front there are four bursæ:
 * a large one is interposed between the patella and the skin, called the prepatellar bursa,
 * a small one between the upper part of the tibia and the ligamentum patellæ,
 * a third between the lower part of the tuberosity of the tibia and the skin,
 * and a fourth between the anterior surface of the lower part of the femur and the deep surface of the Quadriceps femoris, usually communicating with the knee-joint, called the suprapatellar bursa.

Lateral
Laterally there are four bursæ:
 * (1) one (which sometimes communicates with the joint) between the lateral head of the Gastrocnemius and the capsule;
 * (2) one between the fibular collateral ligament and the tendon of the Biceps;
 * (3) one between the fibular collateral ligament and the tendon of the Popliteus (this is sometimes only an expansion from the next bursa);
 * (4) one between the tendon of the Popliteus and the lateral condyle of the femur, usually an extension from the synovial membrane of the joint.

Medial
Medially, there are five bursæ:
 * (1) one between the medial head of the Gastrocnemius and the capsule. This sends a prolongation between the tendon of the medial head of the Gastrocnemius and the tendon of the Semimembranosus and often communicates with the joint. It is also calles the suprapateallar bursa.
 * (2) one superficial to the tibial collateral ligament, between it and the tendons of the Sartorius, Gracilis, and Semitendinosus;
 * (3) one deep to the tibial collateral ligament, between it and the tendon of the Semimembranosus (this is sometimes only an expansion from the next bursa);
 * (4) one between the tendon of the Semimembranosus and the head of the tibia;
 * (5) occasionally there is a bursa between the tendons of the Semimembranosus and Semitendinosus.