Primary intraventricular haemorrhage is a rare presentation of a dural arteriovenous fistula. We describe the case of a 52-year-old woman with a past history of idiopathic intracranial hypertension who presented with sudden-onset severe headache The CT scan on admission showed primary intraventricular haemorrhage with no associated haemorrhage in the brain parenchyma or the extra-axial compartment The cerebral angiogram demonstrated a dural arteriovenous fistula involving the left sigmoid and transverse sinuses which was successfully embolised transvenously. Subependymal venous congestion and rupture secondary to retrograde venous drainage has been proposed as the cause for this presentation.

Intravenous extension of lung carcinoma is rare. A right upper lobe bronchogenic carcinoma with unusually elongated intravenous extension to the left atrium was first visualized with positron emission tomography (PET) and then confirmed with dynamic CT. The PET appearance of intravascular tumour spread is striking, and presents only a short differential diagnosis.

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