Tags: Disease.
Femur-fibula-ulna syndrome (FFU syndrome) or femur-fibula-ulna complex is a very rare syndrome characterized by abnormalities of the femur (thigh bone) fibula (calf bone) and the ulna (forearm bone). There have been suggestions that FFU complex may be the same as proximal femoral focal deficiency (PFFD) although authors are currently in disagreement over whether or not the disorders are in fact separate.