Chondromalicia is non arthritic. does that mean that it is not arthritis? i have fullness feeling in the knee it be liguid? what is a medium effusion

Chondromalacia: Chondromalacia is due to an irritation of the undersurface of the kneecap covered with a layer of smooth cartilage. It is distinct from arthritis, which is joint degeneration/inflammation. Fullness in your knee could be an effusion, which is an abnormal accumulation of fluid in the joint space associated with arthritis or trauma. A medium effusion means a medium amount of fluid in the joint space.

I am sorry it is: Chondromalacia is the first degree of arthritis, what you have in your knee it is joint fluids came from the irritation and friction of chondromalcia.