Subgaleal Haematoma—A Rare Cause of Head Swelling in a School‐Aged Girl

Learning Points Subgaleal haematoma, while rare outside of the neonatal population, is an important cause of head swelling in older children. The presence of a subgaleal haematoma should prompt active exclusion of an underlying bleeding disorder, including Factor XIII deficiency if the coagulation profile, von Willebrand studies, and platelet function are normal. However, SGH can occur in the absence of a bleeding disorder. Patients with subgaleal haematoma should be closely monitored and receive prompt administration of blood products if required, to prevent coagulopathy and tissue hypoperfusion. Rarely, surgical drainage may be required; however, this runs the risk of removing the tamponade effect of blood collected in the subgaleal space.