Fig. 1

Pedigree of family. Squares represent male family members, while circles represent female family members. Black symbol represents individual with acanthosis nigricans, blank symbols represent normal individuals. Arrow indicates proband in the family (IIa). Variant carrier status present as N: Normal allele and M: Mutation. The sequence data displayed heterozygous mutation in FGFR3 (c.1949A > C, p.Lys650Thr) in the proband (IIa)