I DON'T REALLY UNDERSTAND WHAT PFFD IS CAN SOMEONE HELP ME OUT IM TRYING TO FIGUER OUT IF THAT IS WHAT I HAVE. I WAS BORN WITHOUT THE FEMURS ( THE THIGH BONE) THE BIGGEST BONE IN THE BODY. SO CAN SOME ON TELL ME IS THAT P.F.F.D? AND IS THERE ANYONE OUT THERE WITH THE SAME PROBLEM AS ME?