PMC9833418_01
Invasive aspergillosis due to Aspergillus felis involving the base of skull.
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F1
Magnetic resonance imaging (MRI) of his cranium demonstrated a large expansile mass centred on the clivus, expanding into the posterior fossa, pituitary fossa and anteriorly towards the nasopharynx and paranasal sinuses with significant erosion of the anterior skull base (Fig. 1).