The femorotibial joint is the main spheroid part of the stifle joint. It is formed by the thick, rollerlike condyles of the femur articulating with the flattened condyles of the tibia.
In carnivores, it is freely connected with the lateral and medial sacs of the femoropatellar joint, the other part of the stifle joint.
In ruminants, the two femorotibial sacs communicate with each other and the medial femorotibial joint communicates with the femoropatellar joint.
In horses, the femoropatellar joint cavity communicates only sometimes with the lateral femorotibial joint and usually with the medial joint, there is no communication between the two femorotibial joints.
In carnivores, the cavities of the femorotibial joints also include the two sesamoid bones of the grastrocnemius muscle, and the lateral femorotibial joint capsule extends a pouch to form the proximal tibiofibular joint capsule.
Although these terms are not listed in the VIth NAV, the femorotibial joint may be separated into two compartments, the medial and lateral compartment of femorotibial joint.