A rare cause of a large posterior fossa mass: Giant varix

Herein, we report a very rare case of a patient suffering from the simultaneous occurrence of an unusually gigantic posterior fossa varix (measuring 35 mm x 45 mm) and a tentorial dural arteriovenous fistula in the absence of intracranial haemorrhage. Simultaneous occurrence of a varix and a tentorial dural arteriovenous fistula is present in only 4% of all intracranial dural arteriovenous fistulae. These concurrent conditions are associated with a high risk of intracranial haemorrhage and intracranial hypertension that can give rise to focal neurological deficits. Its clinical relevance and radiological findings are discussed in this report.