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Clinical Reviews

Hemophilia B, an atypically heavy bleeding during a routine newborn test


Ibáñez Navarro Aa, Zardoya Santos Pb, Garbayo Solana Jc, Roncal Pérez-Zabalza Sd, García López Ee

aMédico de Familia. CS de Cintruénigo. Navarra. España.
bPediatra. CS de Valtierra. Navarra. España.
cPediatra. CS de Cintruénigo. Navarra. España.
dEnfermera de pediatría. CS de Cintruénigo. Navarra. España.
eEnfermera de pediatría. CS de Cintruénigo. Navarra. España.

Correspondence: A Ibáñez . Email:

Reference of this article.:

Ibáñez Navarro A, Zardoya Santos P, Garbayo Solana J, Roncal Pérez-Zabalza S, García López E. Hemofilia B, un sangrado atípicamente abundante durante una prueba rutinaria de un neonato. Rev Pediatr Aten Primaria. 2022;24:e129-e131..

Published in Internet: 25/02/2022


Hemophilia B is a blood disorder caused by a deficiency of factor IX. Although it is usually diagnosed when the infant starts crawling or walking through the detection of hemarthrosis or  muscle bleeds, in this case the onset occurred at 3 days of age with detection of heavy atypical bleeding during a routine test. The examination and additional testing (blood count, coagulation, ultrasound of soft tissue and large joints) did not evince severe disease. Factor IX, which determines the severity, increased from 1% to 3% in 24 hours, so treatment was not required.

Keywords: Blood coagulation disorders. Hemophilia B. Factor IX. Hematologic diseases. Genetic disease.



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