MAPT and Creutzfeldt Jacob disease: Basic CSF findings at 25 months were normal (RBC 1, WBC 1, protein 37, glucose 75, no oligoclonal bands, and IgG index of 0.5), except she had an elevated total tau of 1351 pg/mL (“>1150 pg/ml consistent with CJD,” NPDPSC), ambiguous 14-3-3 protein (NPDPSC) and mildly elevated (“intermediate”) neuron-specific enolase of 27 ng/mL (Mayo Laboratories; normal < 15, intermediate 15–35, >35 ng/ml consistent with CJD).