When stratifying for the clinicopathological subtype, CSF SNAP-25 levels correlated with survival in both “typical” MM(V)1 CJD (HR 1.36 [1.03–1.80], P = 0.029) and “non-MM(V)1 CJD” (HR 1.69 [1.38–2.06], P < 0.001) groups. The gene discussed is SNAP25; the disease is Miyoshi myopathy.