Mental Retardation, X-Linked 14

Clinical Features

Gendrot et al. (1994) reported a French family in which 9 persons had moderate mental deficiency and poor speech in 3 generations. Some of the patients had facial dysmorphism, epilepsy, and macroorchidism.

Mapping

By linkage analysis in a family segregating mental retardation, Gendrot et al. (1994) found no recombination between the disease locus, designated MRX14, and 2 loci: DXS255 at Xp11.22 (maximum lod = 3.31 at theta = 0) and PGKP1 at Xq11.2-q12 (maximum lod = 3.08 at theta = 0). In a note added in proof, Gendrot et al. (1994) stated that they had found a recombination with MAOB (309860) at Xp11.3, reducing the linkage interval to Xp11.3-q13.3.