OA: It is impossible to say definitively without context, but "oa" may refer to osteoarthritis.
Answered 5/1/2014
4.1k views
Osteoarthritis,OA: Osteoarthritis is caused by cartilage damage and can affect nearly any joint. Primary osteoarthritis is without a known other cause and commonly affects the spine, terminal finger joints, thumbs, hips, knees and feet. Secondary osteoarthritis is due to another cause such as injury, rheumatic disease, metabolic disease, etc. Some is hereditary. Oa usually means this.
Answered 11/26/2016
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