| Charcot-Marie-Tooth disease, type 4B2 (CMT4B2) is a severe early-onset demyelinating CMT peripheral sensorimotor polyneuropathy. Clinically and pathologically very similar to Charcot-Marie-Tooth type 4B1 with childhood-onset of muscle weakness, sensory loss, reduced nerve conduction velocities, characteristic myelin outfoldings and a severe disease course. However, in addition to the severe neuropathy, patients from some CMT4B2 families also develop early-onset glaucoma. Caused by mutations in the MTMR13/SBF2 gene encoding a protein involved in polyphosphoinositide signaling. Transmitted in an autosomal recessive manner. |
