Fabella
The fabella (Latin for little bean) is a small sesamoid bone found in some mammals embedded in the tendon of lateral head of the gastrocnemius muscle behind the lateral condyle of the femur. It is a variant of normal anatomy and present in humans in 10% to 30% of individuals. Rarely, there are 2 or 3 of these bones (fabella bi- or tripartita). It is often mistaken for a loose body or osteophyte.
References
- Duncan W, Dahm D (2003). "Clinical anatomy of the fabella". Clin Anat 16 (5): 448-9. PMID 12903068.
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Source: adapted by the editor from Wikipedia, the free encyclopedia; from the article "Fabella". Image Credit.
