Coincidental Occurrence of Severe Factor XII Deficiency in a Case of Mild Hemophilia A: a Unique Coagulation Laboratory Diagnostic Conundrum

We present a unique case of severe factor XII (FXII) deficiency in a mild hemophilia A patient. The co-occurrence of these two inherited coagulation disorders poses laboratory diagnostic challenges. We discuss the clinical presentation, laboratory findings, and molecular characterization of this unique case.