GH1 and variant Creutzfeldt-Jakob disease: Iatrogenic CJD is rare, though cases continue to be reported due to prior exposure and prolonged incubation periods and can occur from exposure to cadaver derived human pituitary growth hormone (HGH) and pituitary gonadotropin administration, dura mater allografts, neurosurgical instrumentation, corneal transplants, and blood transfusions (NB: three confirmed cases, only occurring from exposure to individuals infected with vCJD) [12].