Type : Phenotype or locus, molecular basis unknown;
Alternative titles and symbols : Brittle hair and mental deficit;
Description : The principal features of Sabinas brittle hair syndrome, a form of nonphotosensitive
trichothiodystrophy (TTDN; see 234050), include congenital hypotrichosis, mild to
moderate onychodysplasia, varying mental retardation, and sterility. Ocular dysplasias
are sometimes present and dentition is normal (Howell et al., 1980).;