[Anterior ethmoidal dural fistulae. 3 new cases].

The authors report three new cases of anterior ethmoidal dural fistulae: a pure pial and two dural and pial fistulae which presented in the form of rupture. The emphasise the computed tomographic features, revealing a unilateral frontopolar haematoma and the need for angiographic assessment including study of the internal and external carotid arteries. Carotid angiography of the fistula defines the therapeutic modalities which are generally surgical.