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.