What would be your occupational therapy approach with this client? THis fitness enthusiast has found his happiness – despite living with two rare bone diseases. 22-year-old Christopher Hebert, otherwise known as CJ, was born with Proximal Femoral Focal Deficiency (PFFD) and Multiple Hereditary Exostoses (MHE). PFFD resulted in CJ missing his right femur bone, whilst MHE has caused painful bone tumours all over his body. CJ, from Kansas, USA, decided to have a Rotationplasty surgery where doctors amputated his right leg but re-attached it so that his foot could act as a mobilised knee-joint within a prosthetic.