Genetic linkage studies were conducted in four multigenerational famil
ies with X-linked Charcot-Marie-Tooth disease (CMTX), using 12 highly
polymorphic short-tandem-repeat markers for the pericentromeric region
of the X chromosome. Pairwise linkage analysis with individual marker
s confirmed tight linkage of CMTX to the pericentromeric region in eac
h family. Multipoint analyses strongly support the order DXS337-CMTX-D
XS441-(DXS56, PGK1).