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Bipartite patella is a condition where the patella, or kneecap, is composed of two separate bones. Instead of fusing together as normally occurs in early childhood, the bones of the patella remain separated. [1] The condition occurs in approximately 1–2% of the population [2] [3] and is no more likely to occur in males than females.
One or both of the sesamoid bones under the first metatarsophalangeal joint (of the great toe) can be multipartite – in two or three parts (mostly bipartite – in two parts). [12] The fabella is a small sesamoid bone found in some mammals embedded in the tendon of the lateral head of the gastrocnemius muscle behind the lateral condyle of the ...
Absent patella: Nail–patella syndrome: Radial head subluxation: Nail–patella syndrome: Posterior iliac horns: Nail–patella syndrome: Intervertebral disk calcification: Alkaptonuria: Erlenmeyer flask deformity of the femur: Gaucher syndrome: Absent thymus: Severe combined immunodeficiency (SCID) DiGeorge syndrome Nezelof syndrome: Osteoporosis
The fabella is a small sesamoid bone found in some mammals embedded in the tendon of the lateral head of the gastrocnemius muscle behind the lateral condyle of the femur.It is an accessory bone, an anatomical variation present in 39% of humans.
Bipartite patella Some people have a normal bipartite patella or two-part patella which can appear as a fracture. The fragment is usually seen in the top outer corner of the patella and can be distinguished from a fracture by being present in both knees.
The patella is found in many tetrapods, such as mice, cats, birds and dogs, but not in whales, or most reptiles. In humans, the patella is the largest sesamoid bone (i.e., embedded within a tendon or a muscle) in the body. Babies are born with a patella of soft cartilage which begins to ossify into bone at about four years of age.
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There are normally two sesamoid bones on each foot; sometimes sesamoids can be bipartite, which means they each comprise two separate pieces. The sesamoids are roughly the size of jelly beans . The sesamoid bones act as a fulcrum for the flexor tendons , the tendons which bend the big toe downward.