V. Lefournier

Clinique Ambroise Paré

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P. Bessou

Hôpital Pellegrin

Alexandre Krainik

Université Grenoble Alpes

J.F. Le Bas

Centre Hospitalier Universitaire de Grenoble

A Vasdev

Centre Hospitalier Universitaire de Grenoble

S. Grand

Centre Hospitalier Universitaire de Grenoble

Sylvie Grand

Université Grenoble Alpes

Olivier Chabre

Inserm

Kamel Boubagra

Centre Hospitalier Universitaire de Grenoble

Irène Troprés

Centre Hospitalier Le Vinatier

S. Schmerber

Inserm

Cooperative Institutions

Centre Hospitalier Universitaire de Grenoble

Université Grenoble Alpes

Inserm

Université Joseph Fourier

Hôpital Albert Michallon

Centre National de la Recherche Scientifique

Grenoble Institute of Neurosciences

Hôpitaux Universitaires de Strasbourg

CEA Grenoble

Commissariat à l'Énergie Atomique et aux Énergies Alternatives

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Elsevier eBooks (2012)

Maher Abu Eid Pascale Anstett Cécile Audibert Robertson Bernardo Guillaume Bierry

10.1016/b978-2-294-71452-8.00030-9

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Citations (0)

L'imagerie nosologique : un outil pour la classification des tumeurs cérébrales par imagerie spectroscopique 1H

Comptes Rendus Chimie (2004)

V. Lefournier Jean‐Luc Bosson Chantal Rémy Fabien Szabo de Edelenyi Anne Ziegler

Proton magnetic resonance

Stereotactic biopsy

10.1016/j.crci.2003.11.009

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Citations (1)

Accuracy of Bilateral Inferior Petrosal or Cavernous Sinuses Sampling in Predicting the Lateralization of Cushing’s Disease Pituitary Microadenoma: Influence of Catheter Position and Anatomy of Venous Drainage

The Journal of Clinical Endocrinology & Metabolism (2003)

V. Lefournier Monique Martinie A Vasdev P. Bessou Jean‐Guy Passagia

Bilateral inferior petrosal sinus sampling (BIPSS) is the most reliable procedure for distinguishing Cushing's disease from ectopic ACTH secretion. However, it is less reliable at predicting the lateralization of the pituitary corticotroph microadenoma. We sought to determine whether this could be improved by taking into account the pattern of venous drainage and the precise location of the catheters. We retrospectively studied data from 86 patients who underwent BIPSS. Cushing's disease was predicted in 74 patients, of whom 69 underwent transsphenoidal surgery. Surgical cure was obtained in 65 patients, with identification of a corticotroph microadenoma in 58 cases. In 49 patients the location of the microadenoma predicted by the intersinus ACTH gradient could be compared with the pathologist's data. BIPSS accurately predicted the lateralization of the microadenoma in only 57% of these patients. Prediction was improved to 71% when both venograms and catheters were symmetric (35 patients). In this subgroup accuracy was 86% in patients with both catheters in the inferior petrosal sinuses compared with 50% in patients with both catheters in the cavernous sinuses (CS). Two transient sixth nerve palsies occurred during CS catheterization. Our data suggest that BIPSS results are much improved when venous drainage is symmetric. Catheterization of CS did not improve the results and was less safe.

Inferior petrosal sinus

10.1210/jc.2002-020374

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Citations (141)

Iconography : IRM de perfusion des tumeurs cérébrales

JF Le Bas S. Grand Alexandre Krainik V. Lefournier Irène Troprés

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IRM et TDM de perfusion dans l'exploration des tumeurs cérébrales

Elsevier eBooks (2018)

Stéphane Kremer Jean‐Christophe Ferré V. Lefournier Sylvie Grand Serge Bracard

10.1016/b978-2-294-75394-7.00009-6

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[Benign vertebral osteoblastoma. Report of 6 cases].

PubMed (1998)

P. Bessou V. Lefournier A Ramoul A Vasdev Kamel Boubagra

Osteoblastoma

Vertebrectomy

Benign tumor

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Citations (7)

Scalar Localization by Cone-Beam Computed Tomography of Cochlear Implant Carriers

Otology & Neurotology (2015)

Eric Boyer A. Karkas Arnaud Attyé V. Lefournier B. Escudé

Objective To compare the incidence of dislocation of precurved versus straight flexible cochlear implant electrode arrays using cone-beam computed tomography (CBCT) image analyses. Study Design Consecutive nonrandomized case-comparison study. Settings Tertiary referral center. Patients Analyses of patients’ CBCT images after cochlear implant surgery. Intervention(s) Precurved and straight flexible electrode arrays from two different manufacturers were implanted. A round window insertion was performed in most cases. Two cases necessitated a cochleostomy. The patients’ CBCT images were reconstructed in the coronal oblique, sagittal oblique, and axial oblique section. Main Outcome Measures The insertion depth angle and the incidence of dislocation from the scala tympani to the scala vestibuli were determined. Results The CBCT images and the incidence of dislocation were analyzed in 54 patients (61 electrode arrays). Thirty-one patients were implanted with a precurved perimodiolar electrode array and 30 patients with a straight flexible electrode array. A total of nine (15%) scalar dislocations were observed in both groups. Eight (26%) scalar dislocations were observed in the precurved array group and one (3%) in the straight array group. Dislocation occurred at an insertion depth angle between 170 and 190 degrees in the precurved array group and at approximately 370 degrees in the straight array group. Conclusion With precurved arrays, dislocation usually occurs in the ascending part of the basal turn of the cochlea. With straight flexible electrode arrays, the incidence of dislocation was lower, and it seems that straight flexible arrays have a higher chance of a confined position within the scala tympani than perimodiolar precurved arrays.

Round window

Electrode array

10.1097/mao.0000000000000705

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Citations (104)

What the Surgeon Cannot See and Needs to See before Middle Ear Surgery

ORL (2010)

S. Schmerber V. Lefournier Alexandre Karkas

To define the utility of imaging prior to middle ear surgery.Different middle ear pathologies are subsequently described: conductive hearing loss with a normal tympanic membrane, labyrinthine fistulae, tegmen anomalies, opacified tympanic membrane, cholesteatoma, temporal bone fractures and glomus tumors. We discuss the indications and benefits of imaging in each of these pathologies.Preoperative imaging shows interesting features and can be very helpful in the differential diagnosis and in surgical decision-making and planning. However, it is not mandatory and should not be systematic in every middle ear surgery.The modern radiological era provides the otological surgeon with numerous imaging technologies. Yet, these techniques should by no means replace the surgeon's anatomical knowledge, clinical sense and surgical skills.

Surgical Planning

Conductive hearing loss

10.1159/000272136

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Citations (7)

One Transient Neurological Complication (Sixth Nerve Palsy) in 166 Consecutive Inferior Petrosal Sinus Samplings for the Etiological Diagnosis of Cushing’s Syndrome

The Journal of Clinical Endocrinology & Metabolism (1999)

V. Lefournier Blandine Gatta Monique Martinie A Vasdev Antoine Tabarin

Comment on Primary Localization of

Etiology

Sixth nerve palsy

Abducens nerve