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Artigues-près-Bordeaux, France

Abelin-Genevois K.,University of Lyon | Abelin-Genevois K.,Cervical Spine Study Group | Idjerouidene A.,University of Lyon | Roussouly P.,Center Medico Chirurgical Of Readaptation Des Massues | And 5 more authors.
European Spine Journal | Year: 2014

Purpose: To describe the normal cervical sagittal alignment of the pediatric spine in a normal population and to identify the changes during growth period. Methods: We randomly selected in PACS database 150 full-spine standing views. Exclusion criteria were: age >18 years, spinal deformity and any disease affecting the spine (medical charts reviewing). For cervical alignment we measured: OC-angle according to Mc Gregor, C1C7 angle, upper cervical angle, inferior cervical angle and C7 tilt. Spino pelvic parameters were analyzed: T1 tilt, thoracic kyphosis, lumbar lordosis, pelvic incidence, sacral slope and pelvic tilt. We compared two age subgroups (juvenile and adolescent). Differences between age groups and gender were tested using Student's t test. Correlations between sagittal spinal parameters were evaluated using Pearson's test. Results: Cervical spine shape was correlated to cranio cervical orientation to maintain horizontal gaze (r = 0.60) and to thoracic kyphosis (r = -0.46). Cervical spine alignment was significantly different between the two age groups except for the global C1C7 cervical lordosis, which remained stable. A significant gender difference was found for all the cervical sagittal angles (p < 0.01) whereas no differences were demonstrated for the spino pelvic parameters, except the lumbar lordosis (p = 0.047). Conclusions: This study is the first to report the cervical spinal alignment in a normal pediatric Caucasian population. Even though cervical lordosis is the common shape, our results showed variability in cervical sagittal alignment. Cervical spine is a junctional area that adjusts its alignment to the head position and to the underlying spinal alignment. © 2014 Springer-Verlag. Source


Wehbe K.,Diamond Light Source | Forfar I.,French Institute of Health and Medical Research | Eimer S.,Pellegrin University Hospital | Cinque G.,Diamond Light Source
Analytical and Bioanalytical Chemistry | Year: 2015

Gliomas are brain tumours classified into four grades with increasing malignancy from I to IV. The development and the progression of malignant glioma largely depend on the tumour vascularization. Due to their tissue heterogeneity, glioma cases can be difficult to classify into a specific grade using the gold standard of histological observation, hence the need to base classification on a quantitative and reliable analytical method for accurately grading the disease. Previous works focused specifically on vascularization study by Fourier transform infrared (FTIR) spectroscopy, proving this method to be a way forward to detect biochemical changes in the tumour tissue not detectable by visual techniques. In this project, we employed FTIR imaging using a focal plane array (FPA) detector and globar source to analyse large areas of glioma tumour tissue sections via molecular fingerprinting in view of helping to define markers of the tumour grade. Unsupervised multivariate analysis (hierarchical cluster analysis and principal component analysis) of blood vessel spectral data, retrieved from the FPA images, revealed the fine structure of the borderline between two areas identified by a pathologist as grades III and IV. Spectroscopic indicators are found capable of discriminating different areas in the tumour tissue and are proposed as biomolecular markers for potential future use of grading gliomas. [Figure not available: see fulltext.] © 2015 The Author(s). Source


Angelliaume A.,Pellegrin University Hospital
Journal of Pediatric Orthopaedics Part B | Year: 2016

To assess sagittal plane spinopelvic balance and functional outcomes in a pediatric cohort of patients with a thoracic and/or a lumbar fracture treated conservatively. A multicentric study retrospectively reviewed radiological and functional outcomes (mean follow-up 49 months) of 48 patients (mean age 12 years) with thoracic and/or lumbar spinal fractures that occurred between 1996 and 2014. Demographic data and radiological spinopelvic parameters were analyzed. Functional outcome was evaluated by a telephone interview. First, a comparison between the initial and the last follow-up full-spine radiographs was performed for the assessment of bone remodeling and sagittal plane balance. Then, patients were classified into two groups (group 1: Risser≤2 and group 2, Risser>2) to assess the influence of skeletal maturity on the restoration of a correct sagittal balance. A total of 62% of the patients were at skeletal maturity at the final follow-up (Risser 4 and 5). Patients with a Risser grade of 2 or less had a higher remodeling potential. The mean residual local kyphosis in thoracic and lumbar fractures was, respectively, 8.2° and 8.7°. The mean thoracic global kyphosis remains stable at the last follow-up, in contrast to lumbar lordosis, which increased significantly. Sagittal plane global measurements on the basis of the C7-plumbline remained unchanged at the last follow-up. There was no change in the pelvic parameters, except for the sacral slope in the group 1 for patients with a lumbar fracture. The current study confirms a greater correction in younger patients (Risser≤2) in spinal fractures and reported that thoracic fractures have a higher remodeling potential than lumbar fracture. A local kyphosis of almost 10° remained at the last follow-up. However, no deterioration in the sagittal plane balance was found. This suggests compensatory mechanisms in adjacent structures for children and adolescents and excludes the only hypothesis of bone remodeling. Copyright © 2016 Wolters Kluwer Health, Inc. All rights reserved. Source


Journy N.,Institute for Radiological Protection and Nuclear Safety | Rehel J.-L.,Institute for Radiological Protection and Nuclear Safety | Ducou Le Pointe H.,Trousseau University Hospital | Lee C.,U.S. National Cancer Institute | And 5 more authors.
British Journal of Cancer | Year: 2015

Background: Recent epidemiological results suggested an increase of cancer risk after receiving computed tomography (CT) scans in childhood or adolescence. Their interpretation is questioned due to the lack of information about the reasons for examination. Our objective was to estimate the cancer risk related to childhood CT scans, and examine how cancer-predisposing factors (PFs) affect assessment of the radiation-related risk. Methods: The cohort included 67 274 children who had a first scan before the age of 10 years from 2000 to 2010 in 23 French departments. Cumulative X-rays doses were estimated from radiology protocols. Cancer incidence was retrieved through the national registry of childhood cancers; PF from discharge diagnoses. Results: During a mean follow-up of 4 years, 27 cases of tumours of the central nervous system, 25 of leukaemia and 21 of lymphoma were diagnosed; 32% of them among children with PF. Specific patterns of CT exposures were observed according to PFs. Adjustment for PF reduced the excess risk estimates related to cumulative doses from CT scans. No significant excess risk was observed in relation to CT exposures. Conclusions: This study suggests that the indication for examinations, whether suspected cancer or PF management, should be considered to avoid overestimation of the cancer risks associated with CT scans. © 2015 Cancer Research UK. Source


Brassart E.,University of Angers | Lebdai S.,University of Angers | Berger J.,University of Limoges | Traore S.,Biostatistic Units | And 6 more authors.
International Journal of Urology | Year: 2012

Objectives: To evaluate the overall survival postnephrectomy for renal cancer for patients aged over 80years, and to identify preoperative prognostic factors that might influence therapeutic strategies. Methods: In a retrospective study in five French departments of urology, 179 patients aged over 80years with renal cell carcinoma underwent radical nephrectomy between 1990 and 2011. The following data were collected: age, sex, body mass index, Charlson Comorbidity Index, American Society of Anesthesiology class, Eastern Cooperative Oncology Group Performance Status, type of surgery, period of follow-up, survival, death etiology, symptoms, Fuhrman grade and tumor-nodes-metastasis stage. Results: After a 29.6-month follow up, 89 patients (49.7%) died. Death etiologies were: cancer for 46 (52%) patients, immediate or distant perioperative complications for five patients (6%) and three patients (3%) respectively, cardiovascular disease for 16 patients (18%), other cancers for three patients (3%) and unknown for 16 patients (18%). In a multivariate analysis, T-stage, M-stage and Charlson Comorbidity Index were identified as independent prognostic factors. Patients were divided into three groups (good, intermediate and bad prognosis) with significantly different survivals of 91, 36 and 22months (P<0.0001), respectively. Conclusions: Preoperative data, including T-stage, M-stage and Charlson Comorbidity Index represent significant independent prognostic factors for survival for patients aged over 80years. These data might help the clinician in selecting the most suitable candidates for radical nephrectomy among elderly patients with renal cancer. © 2012 The Japanese Urological Association. Source

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