Subdural hygroma
Dr Behnam Shayegi and Dr Yuranga Weerakkody et al.
A subdural hygroma refers to a cerebrospinal fluid accumulation in the sub-dural space. In many cases it is considered an epiphenomenon of head injury where it is termed a traumatic subdural hygroma. They generally occur along the supra tentorial cerebral convexities and occurrence in the posterior fossa is generally rare 4.
Imaging features:
Cresentric CSF density accumulation of CSF in subdural space which does not extend into the sulci. Vessels cross thorugh the lesion in contast inhanced studies.
Differential diagnosis
Imaging differential considerations include
- chronic subdural haematoma
- atrophy / involutional change with enlargement of the subarachnoid space
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