Bone formation within the articular cartilage of the lateral compartment of varus osteoarthritic knees

The current study is the first to describe the prevalence, location, and histopathological findings of bone formation within the articular cartilage of the lateral compartment of varus osteoarthritic knees. Since the thickness of the cartilage covering the bone formation is less than that without it, it may result in the deterioration of the lateral compartment after UKA.