Microcephaly

Gene: CEP55

Green List (high evidence)

Homozygous nonsense variants in CEP55 are associated with a lethal condition characterized by multinucleated neurons, anhydramnios, renal dysplasia, cerebellar hypoplasia, and hydranencephaly (MARCH syndrome) also known as Meckel-like syndrome. New report of seven living individuals from five families with biallelic CEP55 variants. Four unrelated individuals with microcephaly, speech delays, and bilateral toe syndactyly all had a common CEP55 variant c.70G>A p.(Glu24Lys) in trans with nonsense variants. Three siblings were homozygous for a consensus splice site variant near the end of the gene. These affected girls all had severely delayed development, microcephaly, and varying degrees of lissencephaly/pachygyria. This series suggests that individuals with compound heterozygosity for nonsense and missense variants in CEP55 have a different viable phenotype.
Sources: Literature

Created: 23 Apr 2020, 3:09 a.m.

Mode of inheritance
BIALLELIC, autosomal or pseudoautosomal

Phenotypes
Multinucleated neurons, anhydramnios, renal dysplasia, cerebellar hypoplasia, and hydranencephaly, MIM# 236500; Microcephaly; Intellectual disability

Publications

• 32100459