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1.
Angiogenesis ; 27(2): 211-227, 2024 May.
Artigo em Inglês | MEDLINE | ID: mdl-38294582

RESUMO

Heterozygous activin receptor-like kinase 1 (ALK1) mutations are associated with two vascular diseases: hereditary hemorrhagic telangiectasia (HHT) and more rarely pulmonary arterial hypertension (PAH). Here, we aimed to understand the impact of ALK1 mutations on BMP9 and BMP10 transcriptomic responses in endothelial cells. Endothelial colony-forming cells (ECFCs) and microvascular endothelial cells (HMVECs) carrying loss of function ALK1 mutations were isolated from newborn HHT and adult PAH donors, respectively. RNA-sequencing was performed on each type of cells compared to controls following an 18 h stimulation with BMP9 or BMP10. In control ECFCs, BMP9 and BMP10 stimulations induced similar transcriptomic responses with around 800 differentially expressed genes (DEGs). ALK1-mutated ECFCs unexpectedly revealed highly similar transcriptomic profiles to controls, both at the baseline and upon stimulation, and normal activation of Smad1/5 that could not be explained by a compensation in cell-surface ALK1 level. Conversely, PAH HMVECs revealed strong transcriptional dysregulations compared to controls with > 1200 DEGs at the baseline. Consequently, because our study involved two variables, ALK1 genotype and BMP stimulation, we performed two-factor differential expression analysis and identified 44 BMP9-dysregulated genes in mutated HMVECs, but none in ECFCs. Yet, the impaired regulation of at least one hit, namely lunatic fringe (LFNG), was validated by RT-qPCR in three different ALK1-mutated endothelial models. In conclusion, ALK1 heterozygosity only modified the BMP9/BMP10 regulation of few genes, including LFNG involved in NOTCH signaling. Future studies will uncover whether dysregulations in such hits are enough to promote HHT/PAH pathogenesis, making them potential therapeutic targets, or if second hits are necessary.


Assuntos
Hipertensão Arterial Pulmonar , Telangiectasia Hemorrágica Hereditária , Adulto , Recém-Nascido , Humanos , Células Endoteliais/metabolismo , Fator 2 de Diferenciação de Crescimento/genética , Fator 2 de Diferenciação de Crescimento/metabolismo , Hipertensão Arterial Pulmonar/metabolismo , Telangiectasia Hemorrágica Hereditária/genética , Telangiectasia Hemorrágica Hereditária/metabolismo , Proteínas Morfogenéticas Ósseas/genética , Mutação/genética , Perfilação da Expressão Gênica , Receptores de Activinas Tipo II/genética , Receptores de Activinas Tipo II/metabolismo
2.
Eur J Med Genet ; 65(1): 104370, 2022 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-34737116

RESUMO

Hereditary haemorrhagic telangiectasia (HHT) is a complex, multisystemic vascular dysplasia affecting approximately 85,000 European Citizens. In 2016, eight founding centres operating within 6 countries, set up a working group dedicated to HHT within what became the European Reference Network on Rare Multisystemic Vascular Diseases. By launch, combined experience exceeded 10,000 HHT patients, and Chairs representing 7 separate specialties provided a median of 24 years' experience in HHT. Integrated were expert patients who focused discussions on the patient experience. Following a 2016-2017 survey to capture priorities, and underpinned by more than 40 monthly meetings, and new data acquisitions, VASCERN HHT generated position statements that distinguish expert HHT care from non-expert HHT practice. Leadership was by specialists in the relevant sub-discipline(s), and 100% consensus was required amongst all clinicians before statements were published or disseminated. One major set of outputs targeted all healthcare professionals and their HHT patients, and include the new Orphanet definition; Do's and Don'ts for common situations; Outcome Measures suitable for all consultations; COVID-19; and anticoagulation. The second output set span aspects of vascular pathophysiology where greater understanding will assist organ-specific specialist clinicians to provide more informed care to HHT patients. These cover cerebral vascular malformations and screening; mucocutaneous telangiectasia and differential diagnosis; anti-angiogenic therapies; circulatory interplays between anaemia and arteriovenous malformations; and microbiological strategies to counteract loss of normal pulmonary capillary function. Overall, the integrated outputs, and documented current practices, provide frameworks for approaches that augment the health and safety of HHT patients in diverse health-care settings.


Assuntos
Telangiectasia Hemorrágica Hereditária/terapia , Gerenciamento Clínico , Europa (Continente) , Humanos , Guias de Prática Clínica como Assunto , Doenças Raras , Telangiectasia Hemorrágica Hereditária/diagnóstico
3.
Cancer Radiother ; 24(6-7): 726-729, 2020 Oct.
Artigo em Francês | MEDLINE | ID: mdl-32807684

RESUMO

Efficient communication between professionals is of upmost importance in improving treatment safety in a radiotherapy department, and is also necessary to enhance the quality of work life. Taking as example the organizations in industry, a self-managed team centred on patients with head and neck cancers treated with radiation has been implemented in 2018 in centre Jean-Bernard (Le Mans, France). After over a year's experience, a real benefice has been found and validates the plan to extend this model to other departments.


Assuntos
Comunicação , Neoplasias de Cabeça e Pescoço/radioterapia , Departamentos Hospitalares , Relações Interprofissionais , Equipe de Assistência ao Paciente/organização & administração , Radioterapia (Especialidade) , França , Humanos
4.
Eur J Cancer ; 104: 108-116, 2018 11.
Artigo em Inglês | MEDLINE | ID: mdl-30343254

RESUMO

AIM OF THE STUDY: The optimal therapeutic strategy in patients with rectal cancer and synchronous unresectable metastases remains unknown. We evaluated the efficacy of FOLFIRINOX induction therapy in this setting. PATIENTS AND METHODS: Chemotherapy-naïve patients received at least 8 cycles of FOLFIRINOX. The primary end-point was the 4-month disease control (4 m DC) rate. Tumour responses were centrally reviewed and assessed by computed tomography scan for metastases (Response Evaluation Criteria in Solid Tumours criteria) and magnetic resonance imaging for rectal tumorus. With a Simon 2-stage design and a targeted (H1) 4 m DC > 75%, 65 patients were enrolled from July 2012 to February 2015: male, 78%; median age, 61 years; performance status, 0-1, 98%; liver metastases, 92%; ≥2 metastatic sites, 63%. RESULTS: Fifty-six (85%) of the 65 patients received the 8 planned FOLFIRINOX cycles. The primary objective was achieved (4 m DC rate: 94%; 95% confidence interval [CI], 86.3-97.8). Primary tumour symptoms decreased from 72% at baseline to 10% at 4 months. Response rate was 86%, and a >70% primary tumour volume decrease was seen in 63% of patients. Forty-four patients (68%) had at least one grade 3 side-effect; no toxic deaths occurred. Median follow-up was 35.0 months (95% CI, 31.3-43.7). Median progression-free survival and overall survival were 10.9 m (95% CI, 8.8-12.9) and 33.4 m (95% CI, 22.6-38.2), respectively. CONCLUSION: Upfront FOLFIRINOX is feasible and allows good local and distant control. It therefore offers the opportunity to choose the best therapeutic strategy for each patient and to personalise treatment according to the local and distant efficacy results of this induction step. TRIAL REGISTRATION: Clinicaltrials.gov, NCT01674309.


Assuntos
Adenocarcinoma/secundário , Protocolos de Quimioterapia Combinada Antineoplásica/uso terapêutico , Neoplasias Retais/tratamento farmacológico , Adenocarcinoma/diagnóstico por imagem , Adenocarcinoma/tratamento farmacológico , Adulto , Idoso , Protocolos de Quimioterapia Combinada Antineoplásica/administração & dosagem , Protocolos de Quimioterapia Combinada Antineoplásica/efeitos adversos , Terapia Combinada , Fadiga/induzido quimicamente , Feminino , Fluoruracila/administração & dosagem , Fluoruracila/efeitos adversos , Seguimentos , Gastroenteropatias/induzido quimicamente , Doenças Hematológicas/induzido quimicamente , Humanos , Irinotecano/administração & dosagem , Irinotecano/efeitos adversos , Estimativa de Kaplan-Meier , Leucovorina/administração & dosagem , Leucovorina/efeitos adversos , Neoplasias Hepáticas/diagnóstico por imagem , Neoplasias Hepáticas/tratamento farmacológico , Neoplasias Hepáticas/secundário , Neoplasias Hepáticas/cirurgia , Neoplasias Pulmonares/diagnóstico por imagem , Neoplasias Pulmonares/tratamento farmacológico , Neoplasias Pulmonares/secundário , Imageamento por Ressonância Magnética , Masculino , Pessoa de Meia-Idade , Oxaliplatina/administração & dosagem , Oxaliplatina/efeitos adversos , Parestesia/induzido quimicamente , Intervalo Livre de Progressão , Indução de Remissão , Tomografia Computadorizada por Raios X , Resultado do Tratamento
5.
Ann Oncol ; 28(10): 2436-2442, 2017 Oct 01.
Artigo em Inglês | MEDLINE | ID: mdl-28961836

RESUMO

BACKGROUND: Outcome of intermediate risk rectal cancer may be improved by the addition of oxaliplatin during 5-fluoruracil concomitant neoadjuvant chemoradiotherapy. The purpose of this study is to analyze the main clinical results of the ACCORD12 trial (NCT00227747) in rectal cancer after 5 years of follow-up. PATIENTS AND METHODS: Inclusion criteria were as follows: rectal adenocarcinoma accessible to digital examination staged T3-T4 Nx M0 (or T2 Nx distal anterior rectum). Two neoadjuvant chemoradiotherapy regimens were randomized: CAP45 (RT 45 Gy + capecitabine) and CAPOX50 (RT 50 Gy + capecitabine and oxaliplatin). Main end point was sterilization of the operative specimen. Acute and late toxicities were prospectively analyzed with dedicated questionnaires. RESULTS: Between November 2005 and July 2008, 598 patients were included in the trial. After a median follow-up of 60.2 months, there was no difference between treatment arms in multivariate analysis either for disease-free survival or overall survival (OS) [P = 0.9, hazard ratio (HR)=1.02; 95% confidence interval (CI), 0.76-1.36 and P = 0.3, HR = 0.87; 95% CI, 0.66-1.15, respectively]. There was also no difference of local control in univariate analysis (P = 0.7, HR = 0.92; 95% CI, 0.51-1.66). Late toxicities were acceptable with 1.6% G3 anal incontinence, and <1% G3 diarrhea, G3 rectal bleeding, G3 stenosis, G3-4 pain, G3 urinary incontinence, G3 urinary retention and G3 skeletal toxicity. There was a slight increase of erectile dysfunction over time with a 63% rate of erectile dysfunction at 5 years. There was no significant statistical difference for these toxicities between treatment arms. CONCLUSIONS: The CAPOX50 regimen did not improve local control, disease-free survival and overall survival in the ACCORD12 trial. Late toxicities did not differ between treatment arms.


Assuntos
Adenocarcinoma/tratamento farmacológico , Adenocarcinoma/radioterapia , Protocolos de Quimioterapia Combinada Antineoplásica/uso terapêutico , Capecitabina/uso terapêutico , Neoplasias Retais/tratamento farmacológico , Neoplasias Retais/radioterapia , Adenocarcinoma/patologia , Adulto , Idoso , Idoso de 80 Anos ou mais , Protocolos de Quimioterapia Combinada Antineoplásica/efeitos adversos , Capecitabina/administração & dosagem , Capecitabina/efeitos adversos , Quimiorradioterapia Adjuvante/efeitos adversos , Intervalo Livre de Doença , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Terapia Neoadjuvante/efeitos adversos , Compostos Organoplatínicos/administração & dosagem , Oxaliplatina , Neoplasias Retais/patologia , Taxa de Sobrevida
6.
Ann Oncol ; 28(7): 1612-1617, 2017 Jul 01.
Artigo em Inglês | MEDLINE | ID: mdl-28472235

RESUMO

BACKGROUND: In 2008, a study of the characteristics of hospitalised patients led to the development of a prognostic tool that distinguished three populations with significantly different 2-month survival rates. The goal of our study aimed at validating prospectively this prognostic tool in outpatients treated for cancer in terminal stage, based on four factors: performance status (ECOG) (PS), number of metastatic sites, serum albumin and lactate dehydrogenase. PATIENTS AND METHODS: PRONOPALL is a multicentre study of current care. About 302 adult patients who met one or more of the following criteria: life expectancy under 6 months, performance status ≥ 2 and disease progression during the previous chemotherapy regimen were included across 16 institutions between October 2009 and October 2010. Afterwards, in order to validate the prognostic tool, the score was ciphered and correlated to patient survival. RESULTS: Totally 262 patients (87%) were evaluable (27 patients excluded and 13 unknown score). Median age was 66 years [37-88], and women accounted for 59%. ECOG PS 0-1 (46%), PS 2 (37%) and PS 3-4 (17%). The primary tumours were: breast (29%), colorectal (28%), lung (13%), pancreas (12%), ovary (11%) and other (8%). About 32% of patients presented one metastatic site, 35% had two and 31% had more than two. The median lactate dehydrogenase level was 398 IU/l [118-4314]; median serum albumin was 35 g/l [13-54]. According to the PRONOPALL prognostic tool, the 2-month survival rate was 92% and the median survival rate was 301 days [209-348] for the 130 patients in population C, 66% and 79 days [71-114] for the 111 patients in population B, and 24% and 35 days for [14-56] the 21 patients in population A. These three populations survival were statistically different (P <0.0001). CONCLUSION: PRONOPALL study confirms the three prognostic profiles defined by the combination of four factors. This PRONOPALL score is a useful decision-making tool in daily practice.


Assuntos
Assistência Ambulatorial , Protocolos de Quimioterapia Combinada Antineoplásica/uso terapêutico , Técnicas de Apoio para a Decisão , Neoplasias/tratamento farmacológico , Cuidados Paliativos , Adulto , Idoso , Idoso de 80 Anos ou mais , Biomarcadores Tumorais/sangue , Progressão da Doença , Feminino , França , Humanos , Estimativa de Kaplan-Meier , L-Lactato Desidrogenase/sangue , Masculino , Pessoa de Meia-Idade , Metástase Neoplásica , Neoplasias/sangue , Neoplasias/mortalidade , Valor Preditivo dos Testes , Modelos de Riscos Proporcionais , Estudos Prospectivos , Reprodutibilidade dos Testes , Fatores de Risco , Albumina Sérica Humana/análise , Fatores de Tempo , Resultado do Tratamento
7.
Cancer Radiother ; 21(4): 286-290, 2017 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-28522278

RESUMO

PURPOSE: The main objective of this study was to evaluate the 5-year efficacy of exclusive laryngeal radiotherapy without node prophylactic irradiation for localized cancers of the vocal cords. PATIENTS AND METHODS: We retrospectively reviewed charts from 258 patients with T1-T2N0 glottic carcinoma irradiated from April 1987 to March 2015 in four France western centers, including pretreated patients. Toxicity was analyzed according to CTCAE v4.0 classification. RESULTS: The median follow-up was 50 months. The median age was 67 years with 87% men and 85.5% had T1 tumor. Five years overall survival was 77.5% (95% confidence interval [95% CI]: 71.4-83.5), 5 years local control was 86.8% (95% CI: 82.3-91.3), specific survival rate was 95% (95% CI: 92.2-97.9) and final laryngectomy-free survival was 87.5% (95% CI: 82.2-92.9). Most toxicities were grade 1 and 2. Grade 3 acute toxicity was 15.5% for the radiation laryngitis, 3.5% for radiodermatitis and 7.7% for dysphonia. Grade 3 chronic toxicity was 3.5% for dysphonia and there were two cases of tracheal stenosis treated by tracheotomy. CONCLUSION: Radiotherapy provides good results in local control of stage I and II vocal cords cancers as well as the toxicity level.


Assuntos
Neoplasias Laríngeas/radioterapia , Prega Vocal , Idoso , Idoso de 80 Anos ou mais , Feminino , França , Humanos , Neoplasias Laríngeas/mortalidade , Neoplasias Laríngeas/patologia , Masculino , Pessoa de Meia-Idade , Estadiamento de Neoplasias , Radioterapia/efeitos adversos , Estudos Retrospectivos , Taxa de Sobrevida
8.
J Gynecol Obstet Biol Reprod (Paris) ; 45(3): 307-14, 2016 Mar.
Artigo em Francês | MEDLINE | ID: mdl-25977141

RESUMO

AIM: To show the effectiveness of ultrasound-guided puncture in the treatment of lactational breast abscess and identify its risk factors. MATERIALS AND METHODS: Retrospective descriptive study at the CHU of Lyon-Sud from December 2007 to December 2013, including patients with lactational breast abscess confirmed on ultrasound and treated with antibiotics and analgesics. Realisation of ultrasound-guided needle under local anesthesia by the radiologist and washing the cavity with physiological serum. RESULTS: Forty patients had lactational abscesses at an average of 10 weeks post-partum. Thirty-four patients were treated by needle aspiration, of which 2 had first surgical drainage. The average size of the abscess was 41.2mm. The success rate of needle aspiration was 91.2%. No cases of recurrence were observed, however, there were 5 fistulisations. In all, 91.2% were treated on an outpatient basis. In 87.8% of cases, breastfeeding was continued on the healthy side and in 48.5% of cases on the affected side. The major risk factor for abscess was mastitis in 91.1% of cases. CONCLUSION: Ultrasound guidance of needle aspiration should be gold standard for the treatment of lactational breast abscesses to continue breastfeeding including the affected side.


Assuntos
Abscesso/etiologia , Abscesso/cirurgia , Doenças Mamárias/etiologia , Doenças Mamárias/cirurgia , Aleitamento Materno/efeitos adversos , Drenagem/estatística & dados numéricos , Abscesso/microbiologia , Abscesso/patologia , Adulto , Biópsia por Agulha , Mama/microbiologia , Mama/patologia , Doenças Mamárias/microbiologia , Doenças Mamárias/patologia , Feminino , Humanos , Lactação/fisiologia , Mastite/etiologia , Mastite/microbiologia , Mastite/patologia , Mastite/cirurgia , Transtornos Puerperais/etiologia , Transtornos Puerperais/patologia , Transtornos Puerperais/cirurgia , Estudos Retrospectivos , Resultado do Tratamento , Ultrassonografia de Intervenção/estatística & dados numéricos
9.
Cancer Radiother ; 19(6-7): 616-20, 2015 Oct.
Artigo em Francês | MEDLINE | ID: mdl-26278991

RESUMO

In August 2013, the French nuclear safety agency (ASN) requested the permanent group of experts in radiation protection in medicine (GPMED) to propose recommendations on the implementation of new technology and techniques in radiation oncology. These recommendations were finalized in February 2015 by the GPMED. In April 2015, the ASN sent a letter to the French ministry of health (DGS/DGOS), and its national health agencies (ANSM, INCa, HAS). In these letters, ASN proposed that, from the 12 recommendations made by the GPMED, an action plan should be established, whose control could be assigned to the French national cancer institute (INCa), as a pilot of the national committee for radiotherapy and that this proposal has to be considered at the next meeting of the national committee of radiotherapy.


Assuntos
Neoplasias/radioterapia , Segurança do Paciente/normas , Radioterapia (Especialidade)/normas , Humanos , Radioterapia/normas
10.
Ann Oncol ; 26(6): 1208-1215, 2015 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-25739671

RESUMO

BACKGROUD: The R98 trial explores the addition of irinotecan to a 5-fluorouracil (5-FU) plus leucovorin (5-FU/LV) adjuvant regimen in optimally resected stages II-III rectal cancers. We report the updated long-term results. Disease-free survival (DFS) was the primary end point. PATIENST AND METHODS: Between March 1999 and December 2005, 357 patients were randomized: 178 in 5-FU/LV and 179 in LV5-FU2 + irinotecan arm. The trial was stratified by control arm: Mayo Clinic regimen or LV5-FU2 regimen. RESULTS: Three hundred and fifty-seven randomized patients were evaluable for efficacy. With a follow-up of 156 months, the DFS was in favour of experimental arm but did not reach statistical significance [hazard ratio (HR) = 0.80, P = 0.154]. The same was observed for overall survival (OS) (HR = 0.87, P = 0.433). The 5-year DFS was 58% in the control arm and 63% in the experimental arm. The 5-year OS was 74% in the control arm and 75% in the experimental arm. Patients allocated to the experimental arm had more grade 3-4 neutropenia when compared with the LV5-FU2 arm (33% versus 6%, P = 0.03), but not when compared with the Mayo Clinic arm (33% versus 36%, P = 0.84). Grade 3-4 diarrhoea tended to be higher in the experimental arm, but analyses stratified by control arm or by radiotherapy failed to show significant differences across strata (test for interaction P = 0.44). CONCLUSION: Even though a benefit of irinotecan in subgroups of patients cannot be excluded, due to early termination and lack of power, the study does not support the addition of irinotecan to 5-FU/LV in routine in patients with resected stage II-III rectal cancer.


Assuntos
Protocolos de Quimioterapia Combinada Antineoplásica/uso terapêutico , Camptotecina/análogos & derivados , Neoplasias Retais/tratamento farmacológico , Neoplasias Retais/cirurgia , Adulto , Idoso , Idoso de 80 Anos ou mais , Protocolos de Quimioterapia Combinada Antineoplásica/efeitos adversos , Camptotecina/efeitos adversos , Camptotecina/uso terapêutico , Quimioterapia Adjuvante , Progressão da Doença , Intervalo Livre de Doença , Término Precoce de Ensaios Clínicos , Feminino , Fluoruracila/uso terapêutico , França , Humanos , Irinotecano , Leucovorina/uso terapêutico , Masculino , Pessoa de Meia-Idade , Estadiamento de Neoplasias , Neoplasias Retais/mortalidade , Neoplasias Retais/patologia , Fatores de Risco , Análise de Sobrevida , Fatores de Tempo , Resultado do Tratamento
11.
Oncologie (Paris) ; 16(5): 267-276, 2014.
Artigo em Inglês | MEDLINE | ID: mdl-26190928

RESUMO

BACKGROUND: In 2006, bevacizumab, a targeted therapy agent was combined with FOLFIRI for the firstline treatment of patients with unresectable metastatic colorectal cancer. METHODS/RESULTS: A study on a homogenous series of 111 patients from the Brittany and Pays de la Loire areas who received bevacizumab-FOLFIRI as first-line treatment in 2006 showed the following results: 51 responses, 29 stabilisations, 21 progressions and 10 cases of toxicity prior to assessment. Median overall survival (OS) was 25.1 months and median progression-free survival was 10.2 months. Surgery secondary to treatment tripled median OS which reached 59.2 months in resected patients versus 18.8 months in unresected patients. Comparison of patients aged more or less than 70 years showed no differences in terms of benefits or risks. CONCLUSION: Bevacizumab-FOLFIRI could be administered as part of a routine care protocol to elderly patients previously evaluated by a geriatric assessment and validated by a multidisciplinary staff.


En 2006, bevacizumab-FOLFIRI représente la thérapie ciblée administrable dès la première ligne chez les patients porteurs d'un cancer colorectal métastatique non opérable. Une série homogène de 111 patients colligés en région Bretagne et Pays de la Loire ayant reçu du bevacizumab- FOLFIRI en première ligne en 2006 révèle les résultats suivants: 51 réponses, 29 stabilités, 21 progressions et 10 toxicités avant évaluation. La médiane de survie globale (OS) est de 25,1 mois et la médiane de survie sans progression (PFS) de 10,2 mois. Dans le cas d'une chirurgie secondaire, l'OS médian triple de 18,8 mois chez les patients non réséqués versus 59,2 mois ceux réséqués. En comparant les sujets âgés de plus et de moins de 70 ans, aucune différence n'a été mise en évidence en termes de bénéfice ou de risque. Bevacizumab-FOLFIRI pourrait être administré en pratique courante chez les personnes âgées sous couvert d'une évaluation gériatrique et d'une approche multidisciplinaire.

12.
Cancer Radiother ; 14 Suppl 1: S74-83, 2010 Nov.
Artigo em Francês | MEDLINE | ID: mdl-21129673

RESUMO

Esophageal cancers are highly malignant tumours with often a poor prognostic, except for minimal lesions treated with surgery. Radiation therapy, or combined radiation and chemotherapy is the most used therapeutic modality, alone or before oesophagectomy. The delineation of target volumes is now more accurate owing the possibility to use routinely the new imaging techniques (mainly PET). The aim of this work is to precise the radio-anatomical particularities, the pattern of spread of esophageal cancer and the principles of 3D conformal radiotherapy illustrated with a clinical case.


Assuntos
Neoplasias Esofágicas/radioterapia , Radioterapia Conformacional/métodos , Terapia Combinada , Neoplasias Esofágicas/diagnóstico por imagem , Neoplasias Esofágicas/tratamento farmacológico , Neoplasias Esofágicas/patologia , Neoplasias Esofágicas/cirurgia , Esofagectomia , Esôfago/anatomia & histologia , Esôfago/patologia , Esôfago/efeitos da radiação , Humanos , Metástase Neoplásica , Estadiamento de Neoplasias , Tomografia por Emissão de Pósitrons/métodos , Prognóstico , Radiografia
13.
Cancer Radiother ; 14(4-5): 327-35, 2010 Jul.
Artigo em Francês | MEDLINE | ID: mdl-20488743

RESUMO

The esophagus is a musculo-membranous tube through which food passes from the pharynx to the stomach. Due to its anatomical location, it can be exposed to ionizing radiation in many external radiotherapy indications. Radiation-induced esophageal mucositis is clinically revealed by dysphagia and odynophagia, and usually begins 3 to 4 weeks after the start of radiation treatment. With the rise of multimodality treatments (e.g., concurrent chemoradiotherapy, dose escalation and accelerated fractionation schemes), esophageal toxicity has become a significant dose-limiting issue. Understanding the predictive factors of esophageal injury may improve the optimal delivery of treatment plans. It may help to minimize the risks, hence increasing the therapeutic ratio. Based on a large literature review, our study describes both early and late radiation-induced esophageal injuries and highlights some of the predictive factors for cervical and thoracic esophagus toxicity. These clinical and dosimetric parameters are numerous but none is consensual. The large number of dosimetric parameters strengthens the need of an overall analysis of the dose/volume histograms. The data provided is insufficient to recommend their routine use to prevent radiation-induced esophagitis. Defining guidelines for the tolerance of the esophagus to ionizing radiation remains essential for a safe and efficient treatment.


Assuntos
Doenças do Esôfago/etiologia , Esôfago/efeitos da radiação , Tolerância a Radiação , Radioterapia/métodos , Doença Aguda , Terapia Combinada , Doenças do Esôfago/diagnóstico por imagem , Esôfago/lesões , Esôfago/patologia , Esôfago/fisiologia , Humanos , Valor Preditivo dos Testes , Probabilidade , Cintilografia , Radioterapia/efeitos adversos , Dosagem Radioterapêutica , Regeneração/efeitos da radiação , Segurança , Telangiectasia/diagnóstico por imagem , Telangiectasia/etiologia , Terfenadina
14.
Int J Med Robot ; 4(4): 373-80, 2008 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-19006201

RESUMO

BACKGROUND: In obstetrics, manipulations are mainly learned during real deliveries. To minimize the risks linked to such training, we propose a childbirth simulator as a teaching tool in hospitals. More specifically, we focus on training with forceps during obstetric manipulation. METHODS: The training method can be divided into two steps: the teaching of forceps placement, and the extraction manipulation. In this paper we focus on the extraction manipulation on the simulator and the analysis of the results, taking into account several parameters and using an evaluation function to obtain a global score. RESULTS: Experimental results reveal novice difficulty while proceeding to the fetus extraction. These results highlight the fact that novices need a personalized training which can be carried out on the BirthSIM simulator. CONCLUSION: Results lead to the conclusion that a simulator training offers benefit to novices by providing them with risk-free training to acquire initial experience before proceeding to conventional training in the delivery room.


Assuntos
Instrução por Computador/estatística & dados numéricos , Parto Obstétrico/educação , Forceps Obstétrico , Traumatismos do Nascimento/prevenção & controle , Competência Clínica , Instrução por Computador/métodos , Parto Obstétrico/instrumentação , Humanos , Internato e Residência/métodos , Obstetrícia/educação , Obstetrícia/instrumentação , Médicos , Ensino/métodos , Materiais de Ensino , Interface Usuário-Computador
15.
Artigo em Inglês | MEDLINE | ID: mdl-19163446

RESUMO

This paper presents a method to evaluate a gesture carried out by a resident obstetrician by comparing it to a gesture carried out by an expert obstetrician. The studied gesture is the forceps blade placement. Resident paths were recorded on a childbirth simulator while placing forceps blades instrumented with six degrees of freedom sensors. The path is characterized by the positions and the orientations. In this paper we particularly focus on the orientations. Forceps orientations are expressed in the quaternion unit space and the curvature of quaternion path is compared by correlation to a reference defined by an expert. Residents have been trained on a simulator and their gestures are evaluated by comparing their orientation path curvatures to reference path curvatures. Quantitative results confirm the qualitative analysis, residents become more similar to the reference while training on simulator.


Assuntos
Instrução por Computador/instrumentação , Extração Obstétrica/educação , Extração Obstétrica/instrumentação , Imageamento Tridimensional/instrumentação , Parto , Cirurgia Assistida por Computador/métodos , Instrução por Computador/métodos , Desenho de Equipamento , Análise de Falha de Equipamento , Extração Obstétrica/métodos , Feminino , Gestos , Humanos , Imageamento Tridimensional/métodos , Forceps Obstétrico , Obstetrícia/educação , Obstetrícia/instrumentação , Obstetrícia/métodos , Gravidez , Risco , Instrumentos Cirúrgicos
16.
Artigo em Inglês | MEDLINE | ID: mdl-18002784

RESUMO

This paper presents a method to evaluate a gesture carried out by a resident obstetrician doctors by comparing it to a gesture carried out by an expert obstetrician doctors. The studied gesture is the forceps blade placement. Residents were recorded on a childbirth simulator while placing forceps blades. Their paths were compared in order to evaluate how similar they are to a reference path defined by an expert. The comparison method is developed with respect to expert requests: time independence and in considering the whole set of data and not only particular points. In order to respect these requests, the developed method lies on the correlation coefficient between the path curvatures. Residents have been trained on a simulator and their gestures were evaluated by comparing their path curvatures to reference path curvatures. Quantitative results confirm the qualitative analysis, residents become more similar to the reference while training on simulator.


Assuntos
Instrução por Computador/instrumentação , Extração Obstétrica/educação , Extração Obstétrica/instrumentação , Gestos , Imageamento Tridimensional/instrumentação , Forceps Obstétrico , Cirurgia Assistida por Computador/métodos , Instrução por Computador/métodos , Desenho de Equipamento , Análise de Falha de Equipamento , Extração Obstétrica/métodos , Imageamento Tridimensional/métodos
17.
Eur J Obstet Gynecol Reprod Biol ; 134(1): 29-36, 2007 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-17049711

RESUMO

OBJECTIVE: To determine the frequency of avoidable neonatal neurological damage. STUDY DESIGN: We carried out a retrospective study from January 1st to December 31st 2003, including all children transferred from a level I or II maternity unit for suspected neurological damage (SND). Only cases confirmed by a persistent abnormality on clinical examination, EEG, transfontanelle ultrasound scan, CT scan or cerebral MRI were retained. Each case was studied in detail by an expert committee and classified as "avoidable", "unavoidable" or "of indeterminate avoidability." The management of "avoidable" cases was analysed to identify potentially avoidable factors (PAFs): not taking into account a major risk factor (PAF1), diagnostic errors (PAF2), suboptimal decision to delivery interval (PAF3) and mechanical complications (PAF4). RESULTS: In total, 77 children were transferred for SND; two cases were excluded (inaccessible medical files). Forty of the 75 cases of SND included were confirmed: 29 were "avoidable", 8 were "unavoidable" and 3 were "of indeterminate avoidability". Analysis of the 29 avoidable cases identified 39 PAFs: 18 PAF1, 5 PAF2, 10 PAF3 and 6 PAF4. Five had no classifiable PAF (0 death), 11 children had one type of PAF (one death), 11 children had two types of PAF (3 deaths), 2 had three types of PAF (2 deaths). CONCLUSION: Three quarters of the confirmed cases of neurological damage occurring in levels I and II maternity units of the Aurore network in 2003 were avoidable. Five out of six cases resulting in early death involved several potentially avoidable factors.


Assuntos
Traumatismos do Nascimento/epidemiologia , Erros Médicos/estatística & dados numéricos , Doenças do Sistema Nervoso/epidemiologia , Assistência Perinatal/estatística & dados numéricos , Traumatismos do Nascimento/complicações , Traumatismos do Nascimento/prevenção & controle , Feminino , França/epidemiologia , Maternidades , Humanos , Mortalidade Infantil , Recém-Nascido , Auditoria Médica , Doenças do Sistema Nervoso/etiologia , Doenças do Sistema Nervoso/prevenção & controle , Parto , Gravidez , Estudos Retrospectivos , Fatores de Risco
18.
Med Trop (Mars) ; 64(2): 195-8, 2004.
Artigo em Francês | MEDLINE | ID: mdl-15460154

RESUMO

Amoebiasis is the second most common parasitic disease in the world. It occurs mainly in developing countries. Many people in endemic countries are asymptomatic carriers. It results in severe disease that can be fatal in rare cases. The case described in this report illustrates the growing risk of exposure to amoebiasis for diabetic patients as travel to endemic countries becomes more and more frequent. In the patient described here amoebiasis led to amoeboma, a rare complication of the colonic presentation. Despite a clinical disease syndrome mimicking that of an occluding gut tumor, the patient was treated medically with drugs alone. Retrospective studies show that diabetics are at higher risk for severe complications after amoebic infection. Because of the high incidence and severity of concurrent diabetes and amoeba, prophylactic measures are necessary for diabetic patients traveling in developing countries.


Assuntos
Amebíase/complicações , Diabetes Mellitus Tipo 2/complicações , Idoso , Feminino , Humanos , Fatores de Risco
20.
Ann Oncol ; 14(10): 1537-42, 2003 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-14504055

RESUMO

BACKGROUND: The purpose of this study was to evaluate the tolerance and efficacy of combining i.v. irinotecan, 5-fluorouracil (5-FU) and leucovorin (LV) with hepatic arterial infusion (HAI) of pirarubicin in non-resectable liver metastases from colorectal cancer. PATIENTS AND METHODS: Thirty-one patients were included in a phase II trial with i.v. irinotecan/5-FU/LV administered every 2 weeks, combined with HAI pirarubicin 60 mg/m(2) on day 1 every 4 weeks. In most cases HAI was administered via a percutaneous catheter. RESULTS: The main grade 3/4 toxicity was neutropenia, encountered in 78% of the patients. When all patients were considered in the analysis, tumour response rate was 15 out of 31 [48%; 95% confidence interval (CI) 32% to 65%]. Liver resection was made possible in 11 patients (35%; 95% CI 21% to 53%). There were no toxic death. Median overall survival was 20.5 months, and median progression-free survival was 9.1 months. In patients with completely resected metastases, median overall survival was not reached and median progression-free survival was 20.2 months. CONCLUSION: The multimodality approach used in the present study was well-tolerated and yielded dramatic responses. An aggressive approach combining i.v. and HAI chemotherapy deserves further investigation.


Assuntos
Protocolos de Quimioterapia Combinada Antineoplásica/uso terapêutico , Camptotecina/análogos & derivados , Neoplasias Colorretais/tratamento farmacológico , Neoplasias Colorretais/patologia , Doxorrubicina/análogos & derivados , Neoplasias Hepáticas/tratamento farmacológico , Neoplasias Hepáticas/secundário , Adulto , Idoso , Camptotecina/administração & dosagem , Terapia Combinada , Intervalo Livre de Doença , Doxorrubicina/administração & dosagem , Esquema de Medicação , Feminino , Fluoruracila/administração & dosagem , Humanos , Infusões Intra-Arteriais , Infusões Intravenosas , Irinotecano , Leucovorina/administração & dosagem , Masculino , Pessoa de Meia-Idade , Neutropenia/induzido quimicamente
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