[Tolerance of ligation and of aseptic thrombosis of deep cerebral veins in man. Apropos of 4 cases].

Classically, ligation of the deep cerebral veins is incompatible with survival in man. The authors report four cases, three surgical and one medical, of thrombosis of these veins, confirmed by angiography and well tolerated. This tolerance may be explained by anatomical study of collateral systems and corroborated by clinical and experimental findings.