Congenital disorders of glycosylation (CDG) is a booming class of metabolic diseases. Its number has increased nearly fourfold (to 45) since 2003, the year of the Komrower lecture, entitled 'Congenital disorders of glycosylation CDG): It's all in it!'. This paper presents an overview of recently discovered CDG and CDG phenotypes, of a diagnostic approach, of (the lack of) treatment, of CDG genetics, of a novel CDG nomenclature and classification, and of some future directions in the CDG field.
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