Modified surgical method of supra- and infratentorial epidural hematoma and the related anatomical study of the squamous part of the occipital bone

Figure 4 A pre- and postoperative computed tomography scan of a 29-year-old man after a traffic accident. A: The preoperative computed tomography (CT) scan showed the left supra- and infratentorial acute epidural hematoma (SIEDH) across the transverse sinus and the local occipital scalp hematoma; B: 24 h after surgery, the head CT showed that the SIEDH was completely cleared and the bone flap was perfectly fixed in situ.