What is the most likely diagnosis for a full-term neonate with spontaneous soft tissue bleeding, joint swelling suggestive of hemarthrosis, normal platelet count, normal prothrombin time (PT), prolonged activated partial thromboplastin time (aPTT), and failure to correct aPTT after mixing with normal plasma?

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What is the most likely diagnosis for a full-term neonate with spontaneous soft tissue bleeding, joint swelling suggestive of hemarthrosis, normal platelet count, normal prothrombin time (PT), prolonged activated partial thromboplastin time (aPTT) that fails to correct with mixing studies?

What is the most likely diagnosis for a full-term neonate presenting with spontaneous soft tissue bleeding and joint swelling suggestive of hemarthrosis, with a normal platelet count, normal prothrombin time (PT), prolonged activated partial thromboplastin time (aPTT), and failure of aPTT to correct after mixing with normal plasma?

What is the most likely diagnosis for a full-term neonate with spontaneous soft tissue bleeding, joint swelling suggestive of hemarthrosis, normal platelet count, normal prothrombin time (PT), prolonged activated partial thromboplastin time (aPTT) that fails to correct with mixing studies?

What is the most likely diagnosis for a full-term neonate presenting with spontaneous soft tissue bleeding, joint swelling suggestive of hemarthrosis, a normal platelet count, normal prothrombin time (PT), but a prolonged activated partial thromboplastin time (aPTT) that fails to correct with mixing studies?

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