In a newborn with delayed umbilical cord separation and bleeding from the cord site, normal prothrombin time, normal activated partial thromboplastin time, normal platelet count and function, and isolated prolonged clot formation time, which is the most likely diagnosis: Factor VIII deficiency, von Willebrand disease, Factor XIII deficiency, or thrombocytopenia?

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Last updated: February 9, 2026 • View editorial policy

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