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Congenital fibrinogen disorders are rare pathologies of the haemostasis, comprising afibrinogenaemia, hypofibrinogenaemia, dysfibrinogenaemia and hypodysfibrinogenaemia. Phenotypic manifestations are variable, patients may be asymptomatic or suffer from bleeding or thrombosis. Most of congenital fibrinogen disorders are coincidentally discovered. Fibrinogen concentrate is used to treat bleeding, whereas low-molecular weight heparin is most often administered for the treatment of thrombotic complications. The aim of this review is to provide an update of the knowledge of congenital fibrinogen disorders for Danish physicians.