Hello Elizabeth , I am Dr. Arun and will be helping you today.The Os acetabulum are most likely due to overweight / obesity (300 pounds). This denote an early osteoarthritis (degenerative arthritis due to over work because of obesity) as the cartilage (which is a glistening surface around the joint and acts as a cushion or shock absorber) gets destroyed at early age due to constant abnormal pressure on the joint. There is a friction between the two bones of the joint which lead to new bone formation called as os acetabulum / os acetabuli. The treatment is;1) Physical therapy2) Deep electrotherapy3) Reduction of weight.4) Surgery.Many times os acetabuli are confused with fatigue fracture or fracture due to injury or accident. Please read this resource; http://www.ncbi.nlm.nih.gov/pubmed/19219806But here it is likely due to overweight induced early osteoarthritis (new bone formation). Please feel free for your follow up questions.
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