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There is a 4 mm x 4 mm enhancing nodule in the posterior fossa, likely to arise from the anterior vermis and possibly in continuity with the inferior fourth ventricle. Very small vessels are noted to feed into this nodule.
No acute haemorrhage or infarction identified.
Normal grey white matter differentiation. The ventricles and basal cisterns are unremarkable for patient's age.
The visualised paranasal sinuses and mastoid air cells are clear.
Conclusion: There is a small enhancing nodule within the posterior fossa is of uncertain significance and unlikely to be contributing to the patient's symptoms. It is unclear whether this arises from the 4th ventricle or whether it is in continuity with choroid plexus. MRI recommended to further characterisation.