What are the complications of FABELLA syndrome? What are the etiology for developing this?

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Fabella syndrome is caused by presence of a little sesamoid bone Postero - lateral to the knee joint .in 10 to 30 % of population Complications-,. 1.Increased incidence of osteoarthritis. 2.Can cause osteomalacia fabellae 3.Increased risk of ACL injury , meniscal and chondral tear after any type of knee trauma. Causes - Exact cause is not known. But there are certain risk factors. 1.Familial tendency for an anatomical variant . 2.Higher incidence in Asian population. 3.Ectomorphic body type or somatotype as in these persons there is less insulation by subcutaneous adipose tissue
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- The fabella is a sesamoid bone in the posterolateral capsule of the knee joint.  - It is believed to have a role similar to the patella in redirecting extension forces of the knee joint from one point to another. - Posterolateral pain and a catching sensation with knee flexion are the result of repetitive friction of the fabella over the posterolateral femoral condyle. - Increased risk of OA of the knee.
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