1887
Volume 2026, Issue 1
  • ISSN: 1999-7086
  • EISSN: 1999-7094

Abstract

Acquired factor XIII (F) deficiency is a rare and often underdiagnosed bleeding disorder. Because standard coagulation tests typically yield normal results, diagnosis and treatment are often delayed in patients with unexplained hemorrhage.

We report the case of a 56-year-old man who presented with severe, recurrent epistaxis unresponsive to conventional management. Initial coagulation tests—including prothrombin time, international normalized ratio, activated partial thromboplastin time, and fibrinogen levels—were all within normal limits. Despite interventional radiology and surgical measures, bleeding persisted. An F activity assay revealed a mild deficiency (48.7%; reference range: 60–130%). Administration of recombinant F (catridecacog, 10 IU/kg) led to rapid clinical improvement and resolution of bleeding.

This case illustrates the diagnostic challenge posed by acquired F deficiency and underscores the importance of including it in the differential diagnosis of unexplained bleeding, especially when standard coagulation parameters are unremarkable.

Prompt recognition and targeted replacement therapy with recombinant F can be life-saving in acquired F deficiency. F activity testing should be considered early in patients with persistent bleeding of unknown origin.

© 2026 Romanelli, Santoriello, Cione, Palmese, Calicchio, Lovine, et al, licensee HBKU Press.
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/content/journals/10.5339/jemtac.2026.18
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Unexplained bleeding related to acquired factor XIII deficiency: A case report
Journal of Emergency Medicine, Trauma and Acute Care 2026, 18 (2026); https://doi.org/10.5339/jemtac.2026.18
/content/journals/10.5339/jemtac.2026.18
/content/journals/10.5339/jemtac.2026.18
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  • Article Type: Case Report
Keyword(s): blood coagulation disorders, case report, factor XIII, hemorrhage and Italy

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