Combination of a supratentorial venous anomaly and infratentorial developmental venous anomalies mimicking AV-malformation: a case report.

Developmental venous anomalies (DVAs) are considered to be congenital anatomical variants of venous drainage. In most cases unspecific symptoms lead to their diagnosis. We describe a 35-year-old patient presenting with headache and dizziness. MRI was suspicious for arteriovenous malformation and the dorsal horn of the right lateral ventricle was enlarged. Digital subtraction angiography showed complex venous malformations with abnormal supratentorial venous drainage and bilateral cerebellar DVAs with associated varix nodes. This is a unique case of complex supra- and infratentorial abnormal venous drainage. After considering the complexity of these venous anomalies and the fact that the patient was asymptomatic there was no reasonable indication for treatment.