Objective: Retrospective study to determine the number of patient with hernial disc in a traverse anatomical cut of the spine, the localization of them and also It Making emphasis in the cases with extraforaminal lumbar disc or call far lateral disc herniation.

Patient and methods: 159 patients were identified during the period of the years 2002 at the 2005 that were operated of lumbar discectomy, we presented hernial disc, The localizations committed was L4-L5 and L5-S1 and a small group in L3. We review the record of the patients with hernial disc extra foraminal and all patients were diagnosed them for study of magnetic resonance image, to determine the clinical square. The surgical technique is described.

Results: Five patients presented hernial disc extra foraminal, one patient presented foraminal and extra foraminal disc herniation, four of them were male and two women. In all them the pain symptom prevailed to level of the knee and anterolateral of the thigh in its half third under the knee, in two of the patients, the rehabilitation treatment was required to present deficit motor for the extension of the leg. 

Conclusions: 3,77% of the patients presented extra foraminal disc and the presence of them should be suspected when the clinical square is of the lumbar high levels and the images of Resonance or CT scan are not conclusive for posterolateral disc herniation, in these cases it can be defined with CT scan with discography.

The encephalocranial trauma (ECT) in children is a health problem of great social repercussion with a high incidence worldwide, whose main causes are falls from height and traffic accidents. The relationship between ECT and traumatic epilepsy has been known since the time of Hippocrates (460-357 BC), who in his treatise 'Cranial Trauma' observed that a wound in the left temporal region of the skull produced convulsive seizures in the right hemisphere and vice versa. With industrialization and particularly with the advent of motorized vehicles, residences with different levels of height and unprotected and violent sports practices, the number of cranioencephalic injuries and, consequently, traumatic epilepsy has increased alarmingly.

Cerebral Arteriovenous Malformations (AVM) are the most common type of intracranial vascular malformation and are the second most common cause (after cerebral aneurysms) of intracranial hemorrhage. Anatomically, AVM is a set of embryologically immature and fragile vessels, located in brain tissue. Hemodynamically it constitutes a system of low pressure of turbulent flow that wears the involved dysplastic vessels, of there its tendency to break up and to bleed.

We report a rare case of dorsal-lumbar spine hydatidosis. The patient is a 15-year-old girl from Chincha, Ica who, due to persistent low back pain and progressive severe paraparesis of a year of evolution, is transferred to the Maria Auxiliadora Hospital. Radiographs, computed tomography, and MRI scans showed multiple vertebral cystic images at L1 and L2 levels with severe invasion of the vertebral canal, which were reported as probable aneurysmal bone cyst. The patient underwent previous percutaneous exploration and appropriate precautions for exploratory and decompressive surgery, evidencing multiple cystic vesicles compatible with spinal hydatidosis, which was later confirmed by pathological anatomy. The clinical recovery was gradual and without cystic recurrence
Showing total recovery with last control at 4 years of the intervention.

  Key words: Spinal hydatidosis, hydatid cyst, spine surgery