A. Pedigree and Sanger variants. Four-generation pedigree shows the affected proband and 8 additional
paternal relatives (filled circles and squares). Sanger sequencing of the identified PMP2 c.155T>C, p.(Ile52Thr) variant
demonstrates segregation of the variant with the phenotype in the proband, father, and two paternal half-brothers, and absence of
the variant in the unaffected mother.
B. Nerve conduction studies of proband. Markedly reduced motor nerve conduction velocities of proband at 21
years were consistent with CMT1 (<38 m/s) demyelinating neuropathy.