KIAA1109-related early lethal congenital brain malformations-arthrogryposis syndrome

Definition

A rare multiple congenital anomalies/dysmorphic syndrome characterized by severe brain malformations associated with cerebral parenchymal underdevelopment, arthrogryposis and club feet due to mutations in KIAA1109 gene. Majority of the cases are early lethal. Milder cases may present with severe global developmental delay, intellectual disability, microcephaly, hydrocephaly, heart defects, renal problems, severe muscle hypotonia causing incapacity to stand without a support,epilepsy, syndactlyly and variable dysmorphic facial features (including hypotelorism, hypertelorism, small eyes, low-set and posteriorly rotated ears, short nose, flattened nasal bridge, anteverted nares, retrognathia).