Organ Donation and Primary Central Nervous System Tumors.

Primary central nervous system tumors can be the cause of brain death. Not all of them contraindicate the donation of organs and tissues for transplant. A survey of cases was carried out in our country in which it was observed that the number of brain deaths caused by primary tumors was low, of the order of 2%, with an ẋ (media) of 3 by year, which would increase the potential for donation.

[Giant cerebral cavernous malformation in a child less than 1 year old: case report].

Cerebral cavernous malformations are rarely described in children. Giant cavernous malformations are exceptional in this group of patients. The authors reports a case of an eleven months boy, who begins at the sixth month of life with epilepsy.

[Topographic anatomy of the asterion].

Background: In the surgical approaches to the posterior fossa, the accurate location of the transverse-sigmoid sinus (TS-SS) complex is of great importance. The asterion is a referral landmark to the transverse sinus location.

Method: Twenty-five skulls of adult cadavers were studied.

[Variants of the anterior circle of Willis. Anatomic and angiografic correlation and its implications in the surgery of intracranial aneurysms. (Acigos anterior cerebral artery, median artery of the corpus callosum and accessory middle cerebral artery)].

It is worlwide accepted that in almost 60% of cases, anatomical variants in the Circle of Willis can be found. Some of them are associated with vascular malformations such as aneurysms. The knowledge of these anatomical variants is of vital importance when facing surgery, being the aims to preserve arteries in unusual localisations, which when injured can determine invalidating sequelae.