In patients with no neurologic deficit and full alertness, a conservative approach may be chosen. Conservative treatment of acute epidural or subdural hematomas is rare. [20] This is usually suggested in patients with a small EDH (less than 1 cm thick and less than 3 cm in length in the anteroposterior plane on CT). If the patient is symptomatic, however (even severe headache present without any focal neurologic deficit), and the EDH is larger than 1 cm thick, surgery is the treatment of choice. In infants, symptoms are not always clear unless irritability or somnolence is observed. Objective signs rather than symptoms thus may be more helpful. If conservative treatment is chosen for an infant on admission, very close observation in an intensive care unit is mandatory. Also, in such cases, because of the lack of language communication and underestimation of symptoms, repeat CT is advised within 12 to 24 hours, even if no neurologic deterioration appears. As described above, one of the infants, a 7-month-old girl, was admitted with bilateral EDH. Conservative treatment was undertaken, with close observation; however, there was no neurologic deterioration during the subsequent 13 hours. On the next morning, repeat CT was performed, which clearly showed enlargement of the EDH on the left. The infant was then taken to the operating room, and bilateral craniotomy was performed. She was discharged within a few days in excellent condition with no neurologic deficit. In this rare example, the hematoma grew on CT without clinical deterioration, and surgery was indicated because the hematoma enlarged. Probably, the child would have deteriorated at a certain point because of the enlarging hematoma, but this was avoided by the routine repeat CT indicated in cases of attempted conservative treatment.