Not usually related: The cisterna magna is a spinal fluid space in the back of the brain which lies just posterior to the cerebellum. The space may be enlarged for a few reasons, both normal and pathologic (abnormal). You should have a MRI to evaluate further (if only CT done) and see Neurosurgeon or Neurologist for their opinion. Do you have any symptoms? Remember headaches can be from stress. Good luck.
Answered 8/6/2018
3.8k views
No and No: It is a normal variant of no consequence and bears no relation to Normal Pressure Hydrocephalus
Answered 8/26/2014
3.8k views
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