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A form of congenital disorder of glycosylation, a genetically heterogeneous group of multisystem disorders caused by a defect in glycoprotein biosynthesis and characterized by under-glycosylated serum glycoproteins. Congenital disorders of glycosylation result in a wide variety of clinical features, such as defects in the nervous system development, psychomotor retardation, dysmorphic features, hypotonia, coagulation disorders, and immunodeficiency. CDGF2 is an autosomal recessive disorder, apparent from birth, characterized by hypotonia, poor feeding, severely impaired intellectual and psychomotor development, seizures with epileptic encephalopathy, visual impairment and other ocular features, respiratory difficulty with frequent infections, as well as contractures. Brain imaging shows cerebellar and brainstem atrophy, hypoplasia or agenesis of the corpus callosum, and white matter abnormalities including periventricular leukomalacia.




Congenital disorder of glycosylation


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