A member asked:
...prominent csf space in the superior posterior fossa, unchanged. it is favored that this represents prominent subarachnoid space/normal variation rather than an arachnoid cyst. is this mega cistern magna? extra fluid? from a head injury?
3 doctors weighed in across 2 answers
Radiologists prefer to write up detail that confirms they have studied the films, They get criticized when they just say "normal" or "unchanged from previous studies". I suspect it just documents a normal variant than is nothing more,
Answered 4/26/2022
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Your description is most consistent with a congenital variant of no clinical consequence. This is not an outcome from "a head injury", and is NOT hydrocephalus. To be conclusive, contact the radiologist and discuss the interpretation directly.
Answered 4/27/2022
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