The authors report a rare case of dorsal-lumbar spine hydatidosis. The patient is a 15-year-old girl from Ica, Peru who presented persistent low back pain and severe progressive paraparesis of one year of evolution, she was transferred to the Hospital Maria Auxiliadora. Radiographs, computed tomography and MRI studies showed multiple vertebral cystic images at L1 and L2 levels with severe spinal canal invasion which were reported as probable aneurysmal bone cyst.

The authors present a technique in which cervical disectomy is performed without fusion and instrumentation. According to them, this technique is a suitable surgical treatment for the majority of cases of prolapsed cervical disc, does not require fusion and avoids specific problems and complications associated with instrumentation and fusion. They continue the follow-up study of these patients, but until these publication date no considerable late problem has become evident.

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.

The present prospective and descriptive study is about of six cases of pyogenic brain abscess, treated at the Hospital II EsSalud Hospital in Cajamarca, Peru, from 1990 to 2006. The average age was 42 years, 3 cases of males and 3 of females. The primary foci were: bronchiectasis, chronic otitis media, dental abscess, chronic sinusitis, cardiogenic origin and in 1 case was not determined. The associated medical conditions were: malnutrition, HIV positive, diabetes mellitus and bacterial endocarditis.

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.

The author present his results of the endovascular treatment of carotid-cavernous fistulas (CCF) in 21 patients treated between October 1994 and July 2004 and conclude that endovascular embolization of his present series proved to be very effective and safe treatment, managing to cure or improve in a significant and permanent way a vast majority of patients with results comparable to those reported in the international reference centers.

The authors presented the first report in Peru of Endoscopic Endonasal Approach for pituitary surgery carried out in the Cayetano Heredia Hospital in december 2008. Although microscopic approaches allow a secure and efective tumoral resection, the endoscopic approach has certain advantages such a better visualization of surgical field  and preservation of sinus nasal funcion, shorter hospital stay and lower rate of complications.

Multiple intracranial aneurysms (MIA) are relatively common, occurring in approximately 23% of all patients with aneurysms. The risk factors include female gender, hypertension, smoking and family history possibly intracranial aneurysms or cerebrovascular disease. The ruptured aneurysm location can be determined with a high accuracy rate with digital angiography when used in conjunction with computed tomography (CT) and magnetic resonance (MR)

The authors report the case of a patient of 16 years with a Chronic subdural hematoma (CSH) formed a left temporal congenital arachnoid cyst, which simulated a meningioma plane, which was operated by craniotomy and resection of membranes.Young people may also have CSH if they have similar conditions that favor developmentof CSH in the elderly, such as a congenital arachnoid cyst, which is a major risk factor for CSH in young and should be considered in the differential diagnosis of these lesions.

The authors report their experience with LINAC Stereotactic Radiosurgery for tumors of the skull base: 32 patients (21 meningiomas and 11 acoustic neurinomas) tracked over 20 months between November 2004 and July 2010. Benign tumors of the skull base have their personalized treatment option, either as primary therapy after subtotal resection or recurrence, radiosurgery is the best choice because it provides high rates of regression with control or low risk of complications.