We report a case of a third ventricular cavernous haemangioma (cavernoma). Cavernomas rarely occur within the ventricular system. Only 47 well-documented cases have been reported in the literature, 21 of which were located in the third ventricle. Cavernomas should be considered in the differential diagnosis of third ventricular lesions. Ventriculoscopy is very useful in establishing the diagnosis.
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