noun
epidural hematoma
Medical term for a collection of blood between the dura mater and the skull.
頭部外傷後に硬膜外血腫が見つかった。
An epidural hematoma was found after the head injury.
Compound of 硬膜 (こうまく, 'dura mater'), 外 (がい, 'outside'), and 血腫 (けっしゅ, 'hematoma').