We report on siblings with probable Adams-Oliver syndrome. The older brother had symmetric intra-uterine growth retardation, plagiocephaly, a cardiac defect and periventricular calcification. The younger sister was born with abdominal and scalp skin defects and small fingers and toes. Prenatal cranial imaging in the younger sibling suggested possible bilateral closed lip schizencephaly and neuronal migrational defect. These siblings are thought to have Adams-Oliver syndrome with the older sibling's features at the milder end of the spectrum while the younger sibling is more severely affected. Several case reports have been published discussing the clinical variability and the possibility of autosomal recessive inheritance. Recently reports suggest an increased frequency of seizures and central nervous system involvement in autosomal recessive Adams-Oliver syndrome. We report affected siblings born to healthy non-consanguineous parents and review previously published similar sibships and case reports in relation to the clinical features.
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