Etienne Louis

Learn More
OBJECTIVE AND IMPORTANCE Cavernomas occur very rarely in the ventricular system. We report three cases of intraventricular cavernomas and review the literature. CLINICAL PRESENTATION A 16-year-old female patient presented with a sudden distal deficit of the left superior limb. She had a voluminous tumor involving the two lateral ventricles, with(More)
We describe our experience with video-assisted thoracoscopic surgery (VATS). Twenty-nine patients were operated on with this technique for various anterior thoracic spinal lesions. There were 6 cases of disc herniation with simple resection, 6 with acute thoracic fractures requiring anterior grafting and stabilization, 7 old fractures and malunions treated(More)
OBJECTIVE AND IMPORTANCE We report a unique case of extended leptomeningeal hemangioblastomatosis in a patient presenting with clinical von Hippel-Lindau disease. CLINICAL PRESENTATION A 50-year-old male patient had a history of three surgical procedures for the removal of a cerebellar hemangioblastoma, initially considered to be a recurrence of a(More)
STUDY DESIGN In vitro evaluation of monitoring screw placement using an image-guided system compared with the routine use of an image intensifier. OBJECTIVES To compare a new computer-guided method of monitoring pedicle screw placement with a well-known method of monitoring using an image intensifier, using measurements of screw placement time and(More)
STUDY DESIGN This report illustrates two rare cases of foramen magnum syndrome caused by a retro-odontoid mass in which calcium pyrophosphate dihydrate crystals were found. OBJECTIVES To analyze the preoperative studies and the diagnostic criteria and to discuss the surgical treatment. The present cases will be compared with previous ones described in the(More)
UNLABELLED The frequency of intramedullary tumors is 0.5 cases per year for 100,000 inhabitants. The study reported herein was a retrospective study conducted from January 1985 to September 2007. MATERIAL Seventy-nine cases were distributed in the following manner: ependymomas, 38; astrocytomas, 22; oligodendrogliomas, four; gangliogliomas, two;(More)
We report our experience of hearing preservation in acoustic neurinoma surgery, using combined retrosigmoid and middle fossa approaches. Fifty neurinomas operated on between 1987 and 1994 were included in this retrospective study. Hearing preservation surgery was performed for patients with grade II or grade III tumors (mean average tumor diameter: 14.4(More)
BACKGROUND AND PURPOSE Intracranial facial nerve schwannomas are rare neoplasms. Preoperative diagnosis is difficult because of non-specific clinical presentations (deafness, facial paralysis sudden or progressive) and radiological differential diagnosis (petrous bone tumor, vestibular schwannoma). Treatment depends on localization and has to be discussed(More)
Osteomas are the most frequent benign tumors of the paranasal sinuses. They often grow in the frontal sinus near the nasofrontal duct. They remain frequently asymptomatic and they tend to be an incidental finding on radiographic studies. Rarely, they extend out of the sinus limits. Two cases with neuro-ophthalmological complications are reported and(More)
Management of patients with sphenoidal cerebrospinal fluid rhinorrhea remains controversial. With consideration of the etiology of cerebrospinal fluid leaks, size of the sinus, location of the fistula, and previous surgery, one may choose either an extracranial or transcranial approach. In two patients in whom conventional procedures failed or seemed to be(More)