Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 20 de 59
Filtrar
1.
Breast Cancer Res Treat ; 173(2): 343-352, 2019 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-30343457

RESUMO

PURPOSE: GANEA2 study was designed to assess accuracy and safety of sentinel lymph node (SLN) after neo-adjuvant chemotherapy (NAC) in breast cancer patients. METHODS: Early breast cancer patients treated with NAC were included. Before NAC, patients with cytologically proven node involvement were allocated into the pN1 group, other patient were allocated into the cN0 group. After NAC, pN1 group patients underwent SLN and axillary lymph node dissection (ALND); cN0 group patients underwent SLN and ALND only in case of mapping failure or SLN involvement. The main endpoint was SLN false negative rate (FNR). Secondary endpoints were predictive factors for remaining positive ALND and survival of patients treated with SLN alone. RESULTS: From 2010 to 2014, 957 patients were included. Among the 419 patients from the cN0 group treated with SLN alone, one axillary relapse occurred during the follow-up. Among pN1 group patients, with successful mapping, 103 had a negative SLN. The FNR was 11.9% (95% CI 7.3-17.9%). Multivariate analysis showed that residual breast tumor size after NAC ≥ 5 mm and lympho-vascular invasion remained independent predictors for involved ALND. For patients with initially involved node, with negative SLN after NAC, no lympho-vascular invasion and a remaining breast tumor size 5 mm, the risk of a positive ALND is 3.7% regardless the number of SLN removed. CONCLUSION: In patients with no initial node involvement, negative SLN after NAC allows to safely avoid an ALND. Residual breast tumor and lympho-vascular invasion after NAC allow identifying patients with initially involved node with a low risk of ALND involvement.


Assuntos
Neoplasias da Mama/patologia , Excisão de Linfonodo/estatística & dados numéricos , Metástase Linfática/diagnóstico , Biópsia de Linfonodo Sentinela/efeitos adversos , Adulto , Idoso , Idoso de 80 Anos ou mais , Protocolos de Quimioterapia Combinada Antineoplásica/uso terapêutico , Axila , Mama/patologia , Mama/cirurgia , Neoplasias da Mama/terapia , Reações Falso-Negativas , Feminino , Humanos , Excisão de Linfonodo/efeitos adversos , Metástase Linfática/patologia , Mastectomia , Pessoa de Meia-Idade , Terapia Neoadjuvante/métodos , Neoplasia Residual/patologia , Seleção de Pacientes , Prognóstico , Estudos Prospectivos , Linfonodo Sentinela/patologia , Biópsia de Linfonodo Sentinela/métodos
2.
Eur J Nucl Med Mol Imaging ; 42(12): 1784-93, 2015 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-26194716

RESUMO

PURPOSE: To evaluate the therapeutic impact of (18)F-fluorocholine (FCH) PET/CT in biochemical recurrent prostate cancer (PC) and to investigate the value of quantitative FCH PET/CT parameters in predicting progression-free survival (PFS). METHODS: This retrospective study included 172 consecutive patients with PC who underwent FCH PET/CT for biochemical recurrence. Mean rising PSA was 10.7 ± 35.0 ng/ml. Patients with positive FCH PET were classified into three groups: those with uptake only in the prostatic bed, those with locoregional disease, and those with distant metastases. Referring physicians were asked to indicate the hypothetical therapeutic strategy with and without the FCH PET/CT results. Clinical variables and PET parameters including SUVmax, SUVpeak, SUVmean, total lesion choline kinase activity (TLCKA) and standardized added metabolic activity (SAM) were recorded and a multivariate analysis was performed to determine the factors independently predicting PFS. RESULTS: In 137 of the 172 patients, the FCH PET/CT scan was positive, and of these, 29.9 % (41/137) had prostatic recurrence, 42.3 % (58/137) had pelvic lymph node recurrence with or without prostatic recurrence, and 27.7 % (38/137) had distant metastases. The FCH PET/CT result led to a change in treatment plan in 43.6 % (75/172) of the 172 patients. Treatment was changed in 49.6 % (68/137) of those with a positive FCH PET/CT scan and in 20 % (7/35) of those with a negative FCH PET/CT scan. After a median follow-up of 29.3 months (95 % CI 18.9 - 45.9 months), according to multivariate analysis age <70 years, SAM ≥23 and SUVmean ≥3 were parameters independently predicting PFS. A nomogram constructed using the three parameters showed 49 months of PFS in patients with the best scores (0 or 1) and only 11 months in patients with a poor score (score 3). CONCLUSION: This study indicates that a positive FCH PET result in PC patients with biochemical recurrence predicts a shorter PFS and confirms the major impact of the FCH PET result on the management of biochemical recurrent PC.


Assuntos
Colina/análogos & derivados , Imagem Multimodal , Tomografia por Emissão de Pósitrons , Neoplasias da Próstata/diagnóstico , Neoplasias da Próstata/metabolismo , Tomografia Computadorizada por Raios X , Idoso , Idoso de 80 Anos ou mais , Intervalo Livre de Doença , Seguimentos , Humanos , Masculino , Pessoa de Meia-Idade , Neoplasias da Próstata/terapia , Recidiva , Estudos Retrospectivos
3.
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.

4.
Ann Chir Plast Esthet ; 58(3): 222-7, 2013 Jun.
Artigo em Francês | MEDLINE | ID: mdl-23518258

RESUMO

OBJECTIVES: Study of the quality of life of 42 patients who underwent a lipofilling in our institution between 2009 and 2010. PATIENTS AND METHOD: Analysis of cosmetic outcomes, side effects, emotional life and preoperative information received by a cohort of 42 patients contacted by anonymous questionnaires. Comparisons between patients with a single prothesis, latissimus dorsi flap with prothesis, autologous latissimus dorsi flap and rectus abdominal flap. RESULTS: The response rate was 56% (42 patients). The average volume of fat injected was 80mL. The aspect of the reconstructed breast and the harmony between two breasts were better after lipofilling (P=0.0001, P=0.0005). The evolution of the aesthetic result is satisfying for 64.1% of the patients. In 29% of cases, patients noticed adhesions at the injection site. Apprehension to touch the reconstructed breast and to wear a swimsuit decreases after lipofilling (P=0.0345;P=0.0284). All patients declared to be satisfied with the presurgery information. Half of the patients declare that the final result corresponds to their wishes. DISCUSSION: The side effects of lipofilling were studied from an oncological point of view. Less publications describe the patients quality of life after lipofilling. This surgery improves the breast reconstruction results and helps patients in a social, affective and aesthetic way. Overall, lipofilling improves more consistency in patients reconstructed by single prothesis and improves more appearance in patients reconstructed by single flap. CONCLUSION: Lipofilling improves significantly patients' quality of life. A clinical research protocol (GRATSEC) is currently underway to extend its indications. The lipofilling should not replace a bad indication of breast reconstruction.


Assuntos
Tecido Adiposo/transplante , Mamoplastia , Qualidade de Vida , Estética , Feminino , Humanos , Estudos Retrospectivos , Inquéritos e Questionários
5.
Prog Urol ; 23(12): 977-85, 2013 Oct.
Artigo em Francês | MEDLINE | ID: mdl-24090782

RESUMO

OBJECTIVE: Evaluate a self-screening questionnaire for bladder cancer of occupational origin and analyse an influence of exposure to a carcinogen bladder tumor on prognosis. PATIENTS AND METHODS: Five hundred and thirty-one patients followed, between 2005 and 2010, for bladder cancer in two university centers have received a self-screening questionnaire derived from questionnaire KVP 08. Patients who responded positively to at least one of the items were considered to have a self-screening questionnaire "positive". Patients were finally invited to take an appointment for consultation in occupational pathology. RESULTS: The response rate to self-screening questionnaire was 39.9% (212/531). It was "positive" in 82 cases (38.7%). Among the 82 patients with a self-screening questionnaire "positive", 46 patients consulted in occupational pathology (56%). Occupational exposure to a bladder carcinogen was documented in 91.3% of cases. Among the 22 patients who consulted in occupational pathology with a self-screening questionnaire "negative", an occupational exposure to a bladder carcinogen was documented in 13.6% of cases. The sensibility of the self-screening questionnaire was 91.3%, the specificity 86.4% and the accuracy 89.7%. The relative risk to have an occupational exposure if the self-screening questionnaire was "positive" was 6.69. The analysis of groups "positive" versus "negative" does not reveal any statistically significant difference in terms of tumor aggressiveness and disease-free survival. CONCLUSION: The self-screening questionnaire was considered relevant with good reliability for detection of occupational exposure to a bladder carcinogen.


Assuntos
Autoavaliação Diagnóstica , Doenças Profissionais/diagnóstico , Inquéritos e Questionários , Neoplasias da Bexiga Urinária/diagnóstico , Idoso , Feminino , Humanos , Masculino , Estudos Retrospectivos
6.
Artigo em Inglês | MEDLINE | ID: mdl-22705556

RESUMO

In centrarchid fishes, such as bluegill (Lepomis macrochirus, Rafinesque) and largemouth bass (Micropterus salmoides, Lacepède), the contractile properties of feeding and swimming muscles show different scaling patterns. While the maximum shortening velocity (V(max)) and rate of relaxation from tetanus of swimming or myotomal muscle slow with growth, the feeding muscle shows distinctive scaling patterns. Cranial epaxial muscle, which is used to elevate the head during feeding strikes, retains fast contractile properties across a range of fish sizes in both species. In bass, the sternohyoideous muscle, which depresses the floor of the mouth during feeding strikes, shows faster contractile properties with growth. The objective of this study was to determine the molecular basis of these different scaling patterns. We examined the expression of two muscle proteins, myosin heavy chain (MyHC) and parvalbumin (PV), that affect contractile properties. We hypothesized that the relative contribution of slow and fast MyHC isoforms will modulate V(max) in these fishes, while the presence of PV in muscle will enhance rates of muscle relaxation. Myotomal muscle displays an increase in sMyHC expression with growth, in agreement with its physiological properties. Feeding muscles such as epaxial and sternohyoideus show no change or a decrease in sMyHC expression with growth, again as predicted from contractile properties. PV expression in myotomal muscle decreases with growth in both species, as has been seen in other fishes. The feeding muscles again show no change or an increase in PV expression with growth, contributing to faster contractile properties in these fishes. Both MyHC and PV appear to play important roles in modulating muscle contractile properties of swimming and feeding muscles in centrarchid fishes.


Assuntos
Proteínas de Peixes/metabolismo , Contração Muscular , Fibras Musculares de Contração Rápida/metabolismo , Cadeias Pesadas de Miosina/metabolismo , Parvalbuminas/metabolismo , Perciformes/metabolismo , Animais , Mitocôndrias Musculares/enzimologia , Desenvolvimento Muscular , Fibras Musculares de Contração Rápida/citologia , Fibras Musculares de Contração Rápida/fisiologia , Fibras Musculares de Contração Lenta/citologia , Fibras Musculares de Contração Lenta/metabolismo , Fibras Musculares de Contração Lenta/fisiologia , Perciformes/fisiologia , Isoformas de Proteínas/metabolismo , Succinato Desidrogenase/metabolismo , Natação
7.
Prog Urol ; 22(1): 30-7, 2012 Jan.
Artigo em Francês | MEDLINE | ID: mdl-22196003

RESUMO

OBJECTIVES: The lymph node metastasis is an important prognostic factor in prostatic cancer. The aim of this prospective study was to evaluate the relevance of the sentinel lymph node biopsy by laparoscopy in staging locoregional patients with clinically localized PC. PATIENTS AND METHODS: A transrectal ultrasound-guided injection by 0.3 mL/100 MBq (99m)Tc-sulfur rhenium colloid in each prostatic lobe was performed the day before surgery. The detection was realized intraoperatively with a laparoscopic probe (Clerad(®) Gamma Sup) followed by extensive dissection. Counts of SLN were performed in vivo and confirmed ex vivo. The histological analysis was performed by hematoxyline-phloxine-safran staining and followed by immunochemistry if SLN is free. RESULTS: Seventy patients with carcinoma of the prostate at intermediate or high risk of lymph node metastases were included. The intraoperative detection rate was 68/70 (97%). Fourteen patients had lymph node metastases, six only in SLN. The false negative rate was 2/14 (14%). The internal iliac region was the first metastatic site (40.9%). A metastatic sentinel node in common iliac region beyond the ureteral junction was present in 18.2%. A non-negligible sentinel metastatic region was the common iliac area (18.2%). Limited or standard lymph node dissection would have ignored respectively 72.7% and 59% of lymph node metastases. CONCLUSION: The laparoscopy is adapted to a broad identification of SLN and targeted dissection of these lymph nodes significantly limited the risk of surgical extended dissection while maintaining the accuracy of the information.


Assuntos
Laparoscopia , Excisão de Linfonodo/métodos , Metástase Linfática/diagnóstico , Neoplasias da Próstata/patologia , Biópsia de Linfonodo Sentinela , Idoso , Carcinoma/patologia , Humanos , Linfonodos/diagnóstico por imagem , Masculino , Pessoa de Meia-Idade , Estudos Prospectivos , Cintilografia , Compostos Radiofarmacêuticos , Coloide de Enxofre Marcado com Tecnécio Tc 99m , Ultrassonografia de Intervenção
8.
ESMO Open ; 7(2): 100402, 2022 04.
Artigo em Inglês | MEDLINE | ID: mdl-35202953

RESUMO

BACKGROUND: Synovial sarcoma (SS) occurs in both adult and pediatric patients. The primary aim of this study is to describe the outcomes, prognostic factors, and treatment of patients with metastatic SS within a nationwide cohort. PATIENTS AND METHODS: All pediatric and adult patients with metastatic SS are registered in the French Sarcoma Group database. Data were collected from the national database https://conticabase.sarcomabcb.org/ up to March 2020. Descriptive and comparative analyses were conducted using SAS 9.4 and Stata Special Edition 16.1 software. RESULTS: Between January 1981 and December 2019, 417 patients with metastatic SS from 17 French sarcoma centers were included, including 64 (15.3%) under the age of 26 years. Median age was 42.5 years (range 9-87 years). The metastases were synchronous (cohort 1) or metachronous (cohort 2) in 18.9% (N = 79) and 81.1% (N = 338) patients, respectively. Median overall survival (OS) from the date of metastasis was 22.3 months (95% confidence interval 19.7-24.1 months). First-line chemotherapy without ifosfamide and/or doxorubicin was unfavorable for progression-free survival and OS (P < 0.001). Concerning cohort 1, young age, surgery of the primary tumor, and single metastatic site were independent favorable prognostic factors for OS. In cohort 2, surgery within an expert French Sarcoma Group center, absence of chemotherapy in the perioperative setting, the lungs as a single metastatic site, time to first metastasis >12 months, local therapy, and ifosfamide in the first metastatic line were independent favorable prognostic factors. CONCLUSIONS: The outcome of patients with metastatic SS is influenced by local treatment, management in reference centers, and cytotoxic treatments given in the perioperative and metastatic setting.


Assuntos
Antineoplásicos , Sarcoma Sinovial , Sarcoma , Adolescente , Adulto , Idoso , Idoso de 80 Anos ou mais , Antineoplásicos/uso terapêutico , Criança , Doxorrubicina/uso terapêutico , Humanos , Ifosfamida/uso terapêutico , Pessoa de Meia-Idade , Sarcoma/tratamento farmacológico , Sarcoma Sinovial/tratamento farmacológico , Sarcoma Sinovial/patologia , Adulto Jovem
9.
Bioresour Technol ; 318: 124083, 2020 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-32916464

RESUMO

A comparative techno-economic assessment and Monte Carlo risk analysis is performed on large scale (3 tonne/h) biochar production plants for conventional (CPS) and microwave (MWP) pyrolysis using six different residue streams. Both plants are viable with minimum selling prices between € 436/tonne and € 863/tonne for CPS, and between € 564/tonne and € 979/tonne for MWP. The CPS is therefore more viable than MWP as it is a simpler and more established technology. However, a 20% biochar price increase due to higher biochar quality makes the MWP technology more viable. Nevertheless, the discounted payback period remains higher than this of CPS due to the increased CAPEX. Biochar price is the most important determinant of a biochar production plant's feasibility, motivating the need for economic and market research on biochar prices in function of biochar characteristics to reduce fluctuations in widely varying biochar prices.


Assuntos
Micro-Ondas , Pirólise , Carvão Vegetal , Rios
10.
Br J Cancer ; 101(1): 166-73, 2009 Jul 07.
Artigo em Inglês | MEDLINE | ID: mdl-19513072

RESUMO

BACKGROUND: We recently identified and validated UBE2C RNA as a prognostic marker in 252 node-positive (N+) breast cancers by means of a microarray study. The aim of this study was to validate UBE2C protein as a prognostic marker in N+ breast cancer by immunohistochemistry (IHC). METHODS: To this end, 92 paraffin-embedded blocks were used. The impact of UBE2C IHC value on metastasis-free survival (MFS) and overall survival (OS) was evaluated and compared with Ki-67 and Nottingham prognostic index (NPI) performances. RESULTS: In accordance with genomic data, UBE2C IHC had a significant impact both on MFS and OS (hazard ratio=6.79 - P=0.002; hazard ratio=7.14 - P=0.009, respectively). Akaike information criterion proved that the prognostic power of UBE2C IHC was stronger than that of Ki-67 (and close to that of NPI). Furthermore, multivariate analyses with NPI showed that, contrary to Ki-67 IHC, UBE2C IHC remained an independent factor, both for MFS (adjusted P=0.02) and OS (adjusted P=0.04). CONCLUSION: We confirmed that UBE2C protein measured by IHC could be used as a prognostic marker in N+ breast cancer. The potential predictive interest of UBE2C as a marker of proteasome activity needs further investigations.


Assuntos
Biomarcadores Tumorais/metabolismo , Neoplasias da Mama/metabolismo , Enzimas de Conjugação de Ubiquitina/metabolismo , Adulto , Idoso , Biomarcadores Tumorais/genética , Neoplasias da Mama/genética , Neoplasias da Mama/patologia , Feminino , Humanos , Imuno-Histoquímica , Antígeno Ki-67/genética , Antígeno Ki-67/metabolismo , Metástase Linfática , Pessoa de Meia-Idade , Análise de Sequência com Séries de Oligonucleotídeos , Prognóstico , Reprodutibilidade dos Testes , Enzimas de Conjugação de Ubiquitina/genética
12.
Br J Cancer ; 98(12): 1993-8, 2008 Jun 17.
Artigo em Inglês | MEDLINE | ID: mdl-18542065

RESUMO

Carcinoma cells lack syndecan-1 expression when they are transiting from an epithelial to a less-differentiated mesenchymal phenotype (epithelial-mesenchymal transition, EMT). Furthermore, a shift of syndecan-1 expression from malignant epithelial cells to reactive stromal cells has also been observed during progression of many carcinomas. Finally, epithelial and/or stromal syndecan-1 expression is of prognostic value in many carcinomas. Because recent results are contradictory in breast carcinomas, we have re-evaluated the prognostic significance of syndecan-1 expression in a cohort of 80 patients with invasive ductal breast carcinomas. The tumours from 80 patients diagnosed with invasive ductal breast carcinomas were used to construct a tissue microarray, which was stained with syndecan-1 by immunohistochemistry. We correlated syndecan-1 expression with clinicopathologic parameters and relapse-free survival (RFS). Exclusive epithelial expression of syndecan-1 is observed in 61.25% of the patients, whereas exclusive stromal expression is observed in 30% of the patients. Only 8.75% of the patients had both stromal and epithelial expressions of syndecan-1. A significant correlation was found between the loss of syndecan-1 epithelial expression and the syndecan-1 stromal expression with high grade of malignancy (P=0.011). The loss of syndecan-1 epithelial expression is correlated with RFS (P=0.001). Using multivariate Cox analysis, loss of epithelial syndecan-1 expression was the only prognostic indicator (P<0.001). We concluded that the loss of syndecan-1 epithelial expression was of strong prognostic value in breast carcinomas.


Assuntos
Neoplasias da Mama/genética , Carcinoma Ductal de Mama/genética , Sindecana-1/genética , Adulto , Idoso , Idoso de 80 Anos ou mais , Neoplasias da Mama/patologia , Carcinoma Ductal de Mama/patologia , Feminino , Humanos , Pessoa de Meia-Idade , Análise Multivariada , Prognóstico
13.
Am J Surg ; 216(3): 438-443, 2018 09.
Artigo em Inglês | MEDLINE | ID: mdl-29656991

RESUMO

BACKGROUND: The purpose of this study was to identify the predictive factors for ypN0 status in tumors with good pathologic response to chemoradiotherapy (CRT). METHODS: A retrospective chart review was conducted on patients at two tertiary cancer center who underwent rectal resection after good response to CRT between 2000 and 2013. RESULTS: No preoperative treatment (oxaliplatin use, radiotherapy boost of 5,4 Gy, delay CRT-surgery) impacted on the ypN status. In the multivariate analysis, only a ypT<3 (HR 7.5 [2,9-19.5]) was significant and no lymphovascular invasion (HR 8,9 [1.6-49.8]) was limited to significance.The best model predicting the ypN0 status used only the ypT status<3. The major part (92.2%) of patients with ypT0-2 tumors had no LN invasion. CONCLUSION: The risk of lymph node involvement metastases was only 7.8% for the patients with an ypT0-2 status. A fullthickness transanal resection coud be the futur treatment of these patients.


Assuntos
Adenocarcinoma/secundário , Linfonodos/patologia , Estadiamento de Neoplasias/métodos , Neoplasias Retais/diagnóstico , Adenocarcinoma/diagnóstico , Adenocarcinoma/terapia , Idoso , Quimiorradioterapia Adjuvante , Colectomia/métodos , Feminino , Humanos , Laparoscopia , Metástase Linfática , Masculino , Pessoa de Meia-Idade , Prognóstico , Neoplasias Retais/terapia , Estudos Retrospectivos
14.
Avian Dis ; 51(4): 924-34, 2007 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-18251404

RESUMO

The potential for infectious bronchitis virus (IBV) and Newcastle disease virus (NDV) replication interference was evaluated using quantitative reverse transcription-polymerase chain reaction (qRT-PCR). Fourteen-day-old broiler chickens were inoculated via eyedrop with live commercial vaccine strains of IBV and NDV alone or in combination to directly evaluate IBV and NDV replication in the trachea at 1, 3, and 5 days after vaccination. Commercial NDV vaccine strains used were B1, VG/GA, and C2. The vaccine strains of IBV tested were Massachusetts (Mass) and Arkansas (Ark). The NDV + Mass vaccines used were commercially manufactured combined products. The NDV + Ark vaccines used were commercial vaccines manufactured as single entity products that were administered by eyedrop to opposite eyes of each chicken. As measured by qRT-PCR, the replication of NDV strains B1, VG/GA, and C2 did not interfere with the growth of IBV Mass and Ark strain vaccines in the combined vaccine treatment groups. Combination vaccinations using B1 and VG/GA did not interfere with IBV immunity based on challenge or serum antibody production. In the C2 + Mass vaccination trial, IBV immunity after challenge was reduced, but it did not seem to be a result of reduced Mass vaccine growth or the ability of the Mass vaccine to induce serum IBV antibody. In contrast, the replication of IBV strains Mass and Ark interfered with the growth of NDV strains B1, VG/GA, and C2 as measured by qRT-PCR. However, interference with NDV replication was not reflected in a reduction in Newcastle disease challenge of immunity findings when combination Mass + NDV products manufactured by vaccine companies were tested. Moreover, NDV immunity was not compromised in two of three trials using single entity vaccines of NDV and Ark IBV vaccines manufactured separately but administered simultaneously. However, in one trial, NDV immunity was decreased where a NDV single entity product (C2) was given with an IBV single entity Ark vaccine. This finding emphasizes the importance of using manufactured combination vaccines whenever possible to avoid potential interference.


Assuntos
Galinhas/imunologia , Vírus da Bronquite Infecciosa/imunologia , Vírus da Doença de Newcastle/imunologia , Doenças das Aves Domésticas/prevenção & controle , Reação em Cadeia da Polimerase Via Transcriptase Reversa/veterinária , Vacinas Virais/imunologia , Animais , Infecções por Coronavirus/prevenção & controle , Esquema de Medicação , Interações Medicamentosas , Doença de Newcastle/prevenção & controle , Doenças das Aves Domésticas/virologia , Organismos Livres de Patógenos Específicos , Replicação Viral
15.
J Radiol ; 88(12): 1873-80, 2007 Dec.
Artigo em Francês | MEDLINE | ID: mdl-18235348

RESUMO

Systematic over-reading of screening mammograms increases the number of cancers detected. Published results will vary based on the particularities of different programs. A feature of the revised French program is that over-reading is limited to ACR BI-RADS 1 and 2 mammograms. In the Loire-Atlantic region, 8.7% of detected cancers between 2003-2005 were detected at over-reading. We have reviewed our database to analyze the features of these cancers detected only by the second reviewer during this period and search for causes of non-detection by the initial reviewer. Cancers detected only by the second reviewer were generally small. Breast parenchyma was mainly type 1 or 2 of the BI-RADS classification. In our study, 60% of these cancers initially missed were considered as "detection errors" because there were not detected by the initial reviewer whereas 40% were considered as "interpretation errors" because they were detected by the initial reviewer but interpreted as benign.


Assuntos
Neoplasias da Mama/diagnóstico por imagem , Mamografia/métodos , Programas de Rastreamento/métodos , Mama/patologia , Neoplasias da Mama/classificação , Calcinose/classificação , Calcinose/diagnóstico por imagem , Carcinoma in Situ/classificação , Carcinoma in Situ/diagnóstico por imagem , Carcinoma Ductal de Mama/classificação , Carcinoma Ductal de Mama/diagnóstico por imagem , Carcinoma Lobular/classificação , Carcinoma Lobular/diagnóstico por imagem , Erros de Diagnóstico , Feminino , França , Humanos , Linfonodos/diagnóstico por imagem , Estudos Retrospectivos , Ultrassonografia Mamária
16.
Cancer Radiother ; 21(1): 4-9, 2017 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-27955888

RESUMO

PURPOSE: To evaluate local control and adverse effects after postoperative hypofractionated stereotactic radiosurgery in patients with brain metastasis. METHODS: We reviewed patients who had hypofractionated stereotactic radiosurgery (7.7Gy×3 prescribed to the 70% isodose line, with 2mm planning target volume margin) following resection from March 2008 to January 2014. The primary endpoint was local failure defined as recurrence within the surgical cavity. Secondary endpoints were distant failure rates and the occurrence of radionecrosis. RESULTS: Out of 95 patients, 39.2% had metastatic lesions from a non-small cell lung cancer primary tumour. The median Graded Prognostic Assessment score was 3 (48% of patients). One-year local control rates were 84%. Factors associated with improved local control were no cavity enhancement on pre-radiation MRI (P<0.00001), planning target volume less than 12cm3 (P=0.005), Graded Prognostic Assessment score 2 or above (P=0.009). One-year distant cerebral control rates were 56%. Thirty-three percent of patients received whole brain radiation therapy. Histologically proven radionecrosis of brain tissue occurred in 7.2% of cases. The size of the preoperative lesion and the volume of healthy brain tissue receiving 21Gy (V21) were both predictive of the incidence of radionecrosis (P=0.010 and 0.036, respectively). CONCLUSION: Adjuvant hypofractionated stereotactic radiosurgery to the postoperative cavity in patients with brain metastases results in excellent local control in selected patients, helps delay the use of whole brain radiation, and is associated with a relatively low risk of radionecrosis.


Assuntos
Lesões Encefálicas/etiologia , Neoplasias Encefálicas/secundário , Neoplasias Encefálicas/cirurgia , Carcinoma/secundário , Carcinoma/cirurgia , Complicações Pós-Operatórias/etiologia , Lesões por Radiação/etiologia , Radiocirurgia/efeitos adversos , Adulto , Idoso , Idoso de 80 Anos ou mais , Encéfalo/diagnóstico por imagem , Encéfalo/patologia , Lesões Encefálicas/diagnóstico por imagem , Lesões Encefálicas/patologia , Neoplasias Encefálicas/diagnóstico por imagem , Carcinoma/diagnóstico por imagem , Feminino , Seguimentos , Humanos , Imageamento por Ressonância Magnética , Masculino , Melanoma/diagnóstico por imagem , Melanoma/secundário , Melanoma/cirurgia , Pessoa de Meia-Idade , Necrose , Recidiva Local de Neoplasia/epidemiologia , Recidiva Local de Neoplasia/prevenção & controle , Neuroimagem , Prognóstico , Lesões por Radiação/diagnóstico por imagem , Lesões por Radiação/patologia , Estudos Retrospectivos , Resultado do Tratamento , Carga Tumoral
17.
J Chromatogr B Analyt Technol Biomed Life Sci ; 834(1-2): 170-7, 2006 Apr 13.
Artigo em Inglês | MEDLINE | ID: mdl-16545990

RESUMO

A rapid, robust and sensitive HPLC method for analysis of uracil (U) and dihydrouracil (UH2) in plasma was developed using solid phase extraction and ultraviolet detection. Separation was achieved with a SymmetryShield RP18 column and an Atlantis dC18 column using a 10 mM potassium phosphate buffer as mobile phase. Compounds were eluted within 15 min without interference. Recovery was 80.4 and 80.6% for U and UH2. Calibration curves were linear from 2.5 to 80 ng/mL for U and 6.75 to 200 ng/mL for UH2. The LLQ was, respectively, 2.5 ng/mL for U, and 6.75 ng/mL for UH2. Within-run and between-run precision were less than 5.94% and inaccuracy did not exceed 7.80%. The overall procedure has been applied to correlate UH2/U ratio with dihydropyrimidine dehydrogenase activity in 165 cancer patients.


Assuntos
Cromatografia Líquida de Alta Pressão/métodos , Espectrofotometria Ultravioleta/métodos , Uracila/análogos & derivados , Uracila/sangue , Fluoruracila/administração & dosagem , Humanos , Padrões de Referência , Reprodutibilidade dos Testes , Sensibilidade e Especificidade
18.
Cancer Radiother ; 10(3): 101-6, 2006 May.
Artigo em Francês | MEDLINE | ID: mdl-16529964

RESUMO

Purpose. - To analyse outcomes after interstitial brachytherapy of facial periorificial skin carcinomas. Patients and methods. - We performed a retrospective analysis of 97 skin carcinomas (88 basal cell carcinomas (BCCs), 9 squamous cell carcinomas (SCCs)) of the nose, periorbital areas and ears from 40 previously untreated patients (group 1) and 57 patients who had undergone surgery (group 2). The average dose was 55 Gy [50-65] in group 1 and 52 Gy [50-60] in group 2 (mean implantation times: 79 and 74 hours respectively). We calculated survival rates and assessed functional and cosmetic results de visu. Results. - Median age was 71 years [17-97]. There were 29 T1, 8 T2, 1 T3 and 2 Tx tumors in group 1. Tumors were<2 cm in group 2. Local control was 92.5% in group 1 and 88% in group 2 (median follow-up: 55 months [6-132]). Five-year disease-free survival was better in group 1 (91% [75-97]) than in group 2 (80% [62-90]), P=0.23. Of the 34 patients whose results were re-assessed, eight presented pruritus or epiphora. One group 2 patient had an impaired eyelid aperture. Cosmetic results were better in group 1 than in group 2, with respectively 72% (8/11) vs 52% (12/23) of good results and 28 (3/11) vs. 43% (10/23) of fair results. Conclusion. - Brachytherapy provided a high level of local control and good cosmetic results for facial periorificial skin carcinomas that pose problems of surgical reconstruction. Results were better for untreated tumors than for incompletely excised tumors or tumors recurring after surgery.


Assuntos
Braquiterapia , Carcinoma Basocelular/radioterapia , Carcinoma de Células Escamosas/radioterapia , Neoplasias da Orelha/radioterapia , Orelha Externa , Neoplasias Palpebrais/radioterapia , Neoplasias Nasais/radioterapia , Neoplasias Cutâneas/radioterapia , Adolescente , Adulto , Idoso , Idoso de 80 Anos ou mais , Braquiterapia/métodos , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Estudos Retrospectivos
19.
J Radiol ; 87(11 Pt 1): 1671-7, 2006 Nov.
Artigo em Francês | MEDLINE | ID: mdl-17095961

RESUMO

OBJECTIVE: FEA lesions group two histological types: columnar cell hyperplasia with atypia (CCHA) and columnar cell change with atypia (CCA). The increasing use of VAB has resulted in increased detection of isolated FEA lesions. The aim of this study was to define the best management possible for these patients: which cases may not need excision? MATERIAL AND METHODS: From our database of 780 VABs carried out from 2000 to 2004, 59 patients with FEA were diagnosed. Cases in which no surgery was performed or all features were not available were excluded, thus excluding 19 cases. Forty patients with FEA were included. We reviewed clinical and mammographic characteristics, histological biopsy, and the corresponding surgically excised tissue features. RESULTS: VAB yielded 25 cases of CCHA and 15 cases of CCA. Surgery revealed seven ductal carcinoma cases (four invasive, three in situ); nine benign lesions, and 24 with atypia (19 FEA and six atypical ductal hyperplasia). We found two features related to the risk of cancer: the presence and the size of hyperplasia. All carcinomas were found within the CCHA lesions. No cancer was yielded when size was less than 10 mm within CCA lesions and lesions that were totally removed. CONCLUSION: We recommend surgical excision when CCHA greater than 10 mm is found on the VAB or it is incompletely removed. CCA lesions or CCHA less than 10 mm or totally removed may obviate systematic surgery.


Assuntos
Biópsia por Agulha , Doenças Mamárias/patologia , Neoplasias da Mama/patologia , Mama/patologia , Carcinoma in Situ/patologia , Carcinoma Ductal de Mama/patologia , Células Epiteliais/patologia , Doenças Mamárias/diagnóstico , Doenças Mamárias/cirurgia , Neoplasias da Mama/diagnóstico , Neoplasias da Mama/diagnóstico por imagem , Neoplasias da Mama/cirurgia , Carcinoma in Situ/diagnóstico , Carcinoma in Situ/cirurgia , Carcinoma Ductal de Mama/diagnóstico , Carcinoma Ductal de Mama/diagnóstico por imagem , Carcinoma Ductal de Mama/cirurgia , Interpretação Estatística de Dados , Diagnóstico Diferencial , Feminino , Humanos , Hiperplasia , Mamografia , Metaplasia , Seleção de Pacientes , Estudos Retrospectivos , Técnicas Estereotáxicas , Vácuo
20.
Cancer Radiother ; 20(8): 794-800, 2016 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-28270323

RESUMO

PURPOSE: To evaluate toxicity and early disease outcome among patients treated for cervical cancer with extended-field helical tomotherapy to the para-aortic nodes. PATIENTS AND METHODS: Thirty-eight patients (International Federation of Gynecology and Obstetrics [FIGO] stage IB2-IVA) from four institutions received extended-field helical tomotherapy and were retrospectively evaluated. All had nodal disease. Para-aortic lymph nodes were involved in 31 patients. Patients were assessed for toxicity using version 4 of the National Cancer Institute's common terminology criteria for adverse events. Survival curves were plotted using Kaplan-Meier estimates. RESULTS: All patients underwent radiation to the tumor region (median dose: 45Gy; range: 44-66Gy), pelvic lymph nodes and para-aortic lymph nodes (median dose: 45Gy; range: 44-60Gy). The median dose to positive lymph nodes was 55Gy (range: 45-65Gy). All received platinum-based chemotherapy (31 concurrently). The median follow-up was 15months. Acute toxicity events observed included one patient with grade 5 febrile neutropenia, 11 patients (29%) with grade 3 hematologic complications. Grades 3-4 gastrointestinal and genitourinary toxicities occurred in six (16%) and four (11%) patients, respectively. Three patients had grade 3 pelvic pain (8%). The 6- and 18-month overall survival rates were 94.7 and 63.9%, respectively. The 18-month locoregional control, disease-free survival, and late grade 3 toxicity rates were 60.2, 43.3 and 7.3%, respectively. CONCLUSION: Extended-field helical tomotherapy was associated with low rates of acute gastrointestinal and genitourinary toxicities with early survival and locoregional control similar to other published series.


Assuntos
Metástase Linfática/radioterapia , Radioterapia de Intensidade Modulada/efeitos adversos , Neoplasias do Colo do Útero/mortalidade , Neoplasias do Colo do Útero/terapia , Adenocarcinoma/mortalidade , Adenocarcinoma/patologia , Adenocarcinoma/terapia , Adulto , Idoso , Antineoplásicos/uso terapêutico , Carcinoma de Células Escamosas/mortalidade , Carcinoma de Células Escamosas/patologia , Carcinoma de Células Escamosas/terapia , Quimiorradioterapia , Cisplatino/uso terapêutico , Feminino , Seguimentos , Humanos , Pessoa de Meia-Idade , Dosagem Radioterapêutica , Estudos Retrospectivos , Neoplasias do Colo do Útero/patologia
SELEÇÃO DE REFERÊNCIAS
DETALHE DA PESQUISA