[Postoperative dural tightness. Value of suturing of the pericranium in surgery of the posterior cranial fossa].

It is difficult to have the dura-mater of the posterior fossa tightly closed, with no excessive traction especially when it was necessary to coagulate some vessels. The use of a pericranial graft taken in the interparietal area on up of the occipital craniotomy permits a tight closure, preventing pseudomeningocele via diffusion of CSF, and without tension gaining space which permits a better tolerance of the post-operative cerebellar oedema.