- Clinical phenotypes of different MPZ (P0) mutations may include Charcot-Marie-Tooth type 1B, Dejerine-Sottas, and congenital hypomyelination. Warner, L.E., Hilz, M.J., Appel, S.H., Killian, J.M., Kolodry, E.H., Karpati, G., Carpenter, S., Watters, G.V., Wheeler, C., Witt, D., Bodell, A., Nelis, E., Van Broeckhoven, C., Lupski, J.R. Neuron (1996)