The medial compartment is that part of the knee where the femur articulates with the tibia - but referring only to the inner or medial side.

medial compartment
The small fibula bone always identifies the lateral side of the knee. The red circle is the medial compartment.


Knee compartments

The knee is considered to have three compartments - the medial compartment, the lateral compartment and the patellofemoral compartment. Arthritis and other conditions may affect only one of the compartments.


The concept of arthritis compartments

An overview to help the reader understand issues of arthritis.



Knee stabilization in patients with medial compartment knee osteoarthritis. Lewek MD, Ramsey DK, Snyder-Mackler L and Rudolph KS. Arthritis Rheum. 2005 Sep; 52(9): 2845–2853.

See also -