Background: The mechanism of continuous massive hemorrhage into the subperiosteal space in children without coagulation defects is unknown. We report a case of giant expanding cephalhematoma reversed by the administration of blood coagulation factor XIII concentrate.
Method: The patient was an 8-year-old boy with a history of minor head trauma who developed a giant expanding cephalhematoma with intraorbital extension. The laboratory data showed severe anemia, but a routine blood coagulation test showed no abnormalities except for a low factor XIII level.
Result: The administration of factor XIII concentrate completely reversed the symptoms in 2 weeks.
Conclusion: We speculate that one of the possible mechanisms of cephalhematoma expansion without blood coagulation defects might be acquired factor XIII deficiency from severe hemorrhage in a hematoma.
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