cctpat16

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F: left-sided frontoparietal "white" (hyperdense) flat area and mass effect and midline shift and ventricle compression

H: Adult man, 54-years-old, blow to the head about three hour ago. Drowsiness, headache, vomiting

INFO/WWW-LINKS Fresh blood is high density compared with brain on CT and, at brain windows, appears white. As the clot absorbs, the lesion becomes isodens (2-3 weeks after bleeding) and, later, of low attenuation
Sites of intracranial heamorrhage/haematoma:
1) Between inner tabel and dura = extradural heamorrhage/haematoma
2) Between dura and arachnoid = subdural heamorrhage/haematoma
3) Between arachnoid and brain surface = subarachnoid heamorrhage/haematoma
4) Within brain = intracerebral heamorrhage/haematoma
5) Within ventricles = intraventricular heamorrhage/haematoma Rising intracranial pressure can be caused by e. g. head injury, meningoencephalitis, haemorrhage or cerebral oedema and tumour

D: At brain windows evidence of a small acute left-sided frontoparietal subdural haematoma with typical crescentic shape. There is also a little mass effect causing compression of the left ventricle and midline shift to the right side.

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