Alternative titles and symbols : Rib gap defects with micrognathia;
Description : Cerebrocostomandibular syndrome (CCMS) is characterized mainly by severe micrognathia,
rib defects, and mental retardation. A spectrum of rib gap defects have been reported
ranging from a few dorsal rib segments to complete absence of ossification. In about
half of the 65 reported cases to date, there is cerebral involvement including mental
retardation, microcephaly, and histologic anomalies. Both autosomal dominant and recessive
inheritance has been described (Zeevaert et al., 2009). See CDG2G (611209) for a cerebrocostomandibular-like
syndrome.;
Inheritance : Autosomal dominant;
Molecular basis : Caused by mutation in the small nuclear ribonucleoprotein polypeptides B and B1 gene
(SNRPB, 182282.0001);