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Minimally displaced left parietal calvarial fracture is seen extending distally, involving the left temporal bone to the level of the zygomatic arch (does not traverse the region of the middle meningeal artery). Overlying this is a moderate-sized subgaleal haematoma and intracranially, there is a combination of subdural and subarachnoid blood demonstrated overlying the left cerebral hemisphere. The subdural collection measures up to 9mm in maximal depth while subarachnoid blood is seen extending into the left frontal, parietal and to a lesser degree temporal lobe sulci. No evidence of acute intraparenchymal haemorrhage.
There is secondary moderate left sided mass effect causing underlying sulcal effacement as well as partial effacement of the left lateral ventricle and secondary contralateral hydrocephalus. Approximately 3.5 millimetre rightward midline shift is also noted.
4mm left frontal subdural haematoma overlies the orbital roof.
Incidental cavum septum pellucidum noted.