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

Cervical injury is common in the hills north of India. Rare types of clinical syndromes are seen due to falls from overweight height in the head. Anterior subluxation of the neck occurs most commonly in the mobile segment of the cervical region 4 (50% in the C5 / 6 joint), high or very low subluxations are rarely reported. We report an unusual case of complete cervical lesion with overlap and antero-position of the C7-T1 segment. We will discuss the various possibilities of complete low cervical subluxation with the review of the existing literature.

Odontoid type II fractures are relatively frequent and its therapeutic approach continues to be subject to considerable debate by the different column groups, both national and international. It is a young woman who suffered a traumatic brain injury in a traffic accident although there was no neurological compromise, persistent neck pain led to the diagnosis of a type II odontoid fracture. Faced with refractoriness to conservative treatment the patient was taken to surgery, in which an anterior fixation of the odontoid process was performed.
Odontoid fractures type II can be treated with a surgical or medical approach, each with advantages and disadvantages and in any case none free of morbidity. Surgical treatment is indicated by the failure of the conservative approach.

Chronic subdural hematoma (CSDH) is a common pathology in daily neurosurgical practice that usually develops in older people due to brain atrophy related to age, being rare in young people. We report the case of a patient of 16 years with a HSDC formed a left temporal congenital arachnoid cyst, which
simulated a meningioma plane, which was operated by craniotomy and resection of membranes, and its postoperative course was favorable Young people may also have HSDC if they have similar conditions that favor developmentof chronic subdural hematoma in the elderly, such as a congenital arachnoid cyst, which is a major risk factor for chronic hematoma in young and should be considered in the differential diagnosis of these lesions. Surgical treatment may be performed by trephination and irrigation or by craniotomy.
 

Objective: Demonstrate the effectiveness of the percutaneous microcompression of the Gasserian ganglion with the balloon of Fogarty in the surgical treatment of trigeminal neuralgia.
Patients and methods: There was realized a descriptive retrospective and prospective study of 24 patients with trigeminal neuralgia treated surgically by the technique of percutaneous microcompression of the Gasserian ganglion with the balloon of Fogarty in the Clinics Maison de Santé between January 2005 until December 2009. The medical records and operative reports were review and the data were grouped according to study variables.
Results: The 66.7% of patients were female. The mean ages for the patients were 63.1 +/- 11.9 years and the average time of the disease was 8.1 +/- 4.8 years. The right side of the face was the most affected in 70.8%, and the trigeminal branches most affected were the combination of the second and third at 50%. The mean operating time was less than 30 minutes. In 91.7% of patients had no facial pain after surgery and no recurrence at one year by 83.3%. 
Conclusions: The percutaneous microcompression of the Gasserian ganglion with the balloon of Fogarty is a highly effective technique in the surgical treatment in patients with trigeminal neuralgia.