floating patella

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float·ing pa·tel·la

a patella elevated by the presence of a knee effusion.

floating patella

Etymology: AS, flotian + L, patella, small pan
a patella that has been forced away from the femoral condyle by an effusion into the knee joint.

bal·lot·able pa·tel·la

(bă-lot'ă-bĕl pă-tel'ă)
A condition in which the patella can be balloted because of an effusion of blood or fluid in the capsule of the knee joint.
Synonym(s): floating patella.

floating patella

A patella that rides up from the condyles owing to a large effusion in the knee.
Synonym: ballotable patella
See also: patella
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