Adams-Oliver syndrome (AOS) is a rare developmental disorder defined by the combination of aplasia cutis congenita of the scalp vertex and terminal transverse limb defects (e.g., amputations, syndactyly, brachydactyly, or oligodactyly). In addition, vascular anomalies such as cutis marmorata telangiectatica congenita, pulmonary hypertension, portal hypertension, and retinal hypervascularization are recurrently seen. Congenital heart defects have been estimated to be present in 20% of AOS patients; reported malformations include ventricular septal defects, anomalies of the great arteries and their valves, and tetralogy of Fallot (summary by Stittrich et al., 2014).
Genetic Heterogeneity of Adams-Oliver Syndrome
Other autosomal dominant forms of Adams-Oliver syndrome include AOS3 (614814), caused by mutation in the RBPJ gene (147183) on chromosome 4p15; AOS5 (616028), caused by mutation in the NOTCH1 gene (190198) on chromosome 9q34; and AOS6 (616589), caused by mutation in the DLL4 gene (605185) on chromosome 15q15.1.
Autosomal recessive forms of Adams-Oliver syndrome include AOS2 (614219), caused by mutation in the DOCK6 gene (614194) on chromosome 19p13, and AOS4 (615297), caused by mutation in the EOGT gene (614789) on chromosome 3p14. [from
OMIM]