Pituitary adenomas are benign tumors that occur in approx. 10 to 15% of all intracranial tumors. Treatment can be carried by transsphenoidal resection (TSR) or transcranial resection (TCR). The aim of this study is to present the results of surgical treatment in a series of 403 patients operated at the Almenara Hospital, in Peru, between 2000 and 2008.

Cerebellar mutism is a non infrequent alteration of the language in patients who underwent to a surgery of different injuries, generally tumors, affecting vermis or cerebellar hemispheres. In this paper the authors make a brief revision of this problem at the time they report a case of a 18 years-old patient who had a mass in the cerebellar vermis that was operated trough a suboccipital craniotomy and telovelar approach.

Chronic subdural hematoma (CSH) is a common pathology in elderly patients. Its etiology is usually due to rupture of bridging veins, which kept bleeding into the subdural space will generate a chronic inflammatory process which results in a collection that will grow in volume producing symptoms of intracranial hypertension or neurological focus. The third nerve palsy presenting as chronic subdural hematoma is rare, the authors present the case of a patient with this disease.

Astroblastoma is a tumor of the glial lineage of unknown origin and uncertain prognosis. Represents 0,4 - 2,8% of brain gliomas, which generally presents in youth people as an hemispheric well defined tumor, often associated with a cystic component, being extremely rare intraventricular location. The author reports the case of a patient of 4 years old girl with intraventricular astroblastoma and a review of the literature.