In the primary cohort, MBP quantification revealed significantly higher CSF levels in CJD compared to AD (p = 0.004) and controls (p = 0.0001) and this difference remained significant after adjustment for age and neurofilament light chain (NfL), indicating that MBP elevations cannot be explained solely by neuroaxonal degeneration. The gene discussed is MBP; the disease is Creutzfeldt Jacob disease.