When we read or hear Normal Pressure Hydrocephalus or chronic hydrocephalus of the adult as it is called at the moment, the Hakim Adams Syndrome comes to our mind immediately. We find it very important to expose the history of the discovery of hydrocephalus at normal pressure,
Pathology that to date has many questions and is a subject of constant research.

The presence of neuropsychological alterations in the mental status of patients with brain traumatic injury (BTI). Are characteristic of the disease and are considered as focal symptoms or isolated deficits. In frequency in the BTI. There is a usual way of presenting cognitive impairment. The alterations of the prefrontal cortex and the irregularities of the superior order of the behavior are one of the first psychopathological manifestations of BTI. From the neuropsychological point of view, frontal lobe functions, given their high level of cortical integration and control of other cognitive functions, are difficult to evaluate directly. Some of the earliest evidence comes from the well-known case of Phineas Gage (Harlow 1848-1868), who survived the accident he suffered living until he was 38 years old with the iron rod that pierced the front of his brain and went through the Head, had no obvious neurological deficits, no sensory or motor loss, and was able to speak coherently even after the accident. As the acute effects of the injury diminished, his behavior changed completely, he showed irresponsible, disorderly. The regulation of his behavior was affected by his accident.

Tumors of the meninges are primary tumors that originate in meningothelial cells or non-meningothelial mesenchymal cells. The different types of existing tumors are determined by the appearance of the neoplastic cells in the microscope. 2.- Etiology: Unknown. 3.- Pathophysiology: The presence of the tumor in the intracranial level produces an imbalance of the compartments of the intracranial content, that is of the blood volume and the CSF, producing endocanean hypertension. The symptoms and signs presented are related to the topography of the lesion.4.- Epidemiology: Tumors of intracranial meninges account for 10% -15% of all primary intracranial tumors. There are no known epidemiological factors.

The fractures of Odontoid type II according to the classification of Anderson and D'Alonzo are considered the most unstable and were always difficult to handle. External immobilization is used as a frequent method by some authors, however surgery provides better fixation. Back surgery such as inter laminar and Magerl interfacetaria are used but they block the rotational mobility of the atlas axis segment. Bohler describes the first surgeries previously, this technique was modified in recent years and is currently being performed with minimally invasive approach techniques.
In the present work we present the experience of the technique used in our series and a review of the literature with respect to this pathology and the techniques of management of such lesions.

In tumors of the posterior fossa and previous analysis of the neurological conditions upon admission (in adults, Karnofski greater than and equal to 70) and the age of the patient, a ventriculoperitoneal shunt will be planned first if there is hydrocephalus or when in Each case is justified; Then total or subtotal or partial resection of the tumor will be performed to decompress the cranial cavity, reduce endocranial hypertension in the posterior fossa, and obtain tumor material for histopathological analysis. If the tumor is located at the intraspinal level, a total or partial resection will be performed, when the patient still retains some degree of motor function in the limbs; However if there is paraplegia or quadriplegia complete grade 0/5 long installation, the operation would not be justified since it is known beforehand that motor-sensory-sphincter function will not recover. The next form of complementary treatment could be with radiotherapy for some cases with residual tumor and according to the pathology.