proximal femoral focal deficiency

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prox·i·mal fem·o·ral fo·cal de·fi·cien·cy (PFFD),

a congenital defect in which variable portions of the superior end of the femur are reduced or absent.
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Her condition, proximal femoral focal deficiency - said to affect just one in a million people - meant her knee was where her hip should be, her shin replaced her thigh and her ankle acted as a knee joint.
Nine-year-old Lentrit Aliu, who has a birth defect called proximal femoral focal deficiency, underwent surgery last week at Shriners Hospitals for Children -- Shreveport.

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