Osteonecrosis of the medial tibial condyle

Spontaneous osteonecrosis of the Knee, is the result of vascular arterial insufficiency to the medial femoral condyle of the knee resulting in necrosis and destruction of bone. It is often unilateral and can be associated with a meniscal tear. [Source: Wikipedia ]

Blount osteonecrosis
Is A
Site-specific avascular necrosis