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1.
Rev Neurol ; 70(2): 67-71, 2020 Jan 16.
Artigo em Espanhol | MEDLINE | ID: mdl-31930472

RESUMO

INTRODUCTION: Hallucinations are one of the most bizarre experiences in several diseases. They appear in mental diseases as well as in physical illnesses and may be the consequence of the usage of drugs of abuse. However, a detailed analysis of how patients feel under hallucinations caused by different diseases is uncommon. AIM: This article analyses how visual hallucinations are considered in the works of the neurologist and writer Oliver Sacks, with special attention to his book Hallucinations. DEVELOPMENT: Hallucinations have been under consideration by culture, religion and arts, which has led to multiple interpretations. Sacks's interest in perception of sensations led him to work on the analysis of hallucinations, given the limited knowledge on the topic. References to hallucinations appeared in several of his books like Migraine, Awakenings and A leg to stand on. In Musicophilia Sacks approached the auditory hallucinations and in Hallucinations he considered them in depth. In the latter work, Sacks analyses especially those present in Charles Bonnet syndrome, in situations of sensory deprivation, in patients with epilesy, those present during treatment with levodopa and those caused by drug of abuse. CONCLUSIONS: Hallucinations is one of Sacks's books with greater neuroophthalmological content. The descriptions of the hallucinations of his patients or those experienced by himself, as well as the reflective analysis on the world of perception make this book one of the most fascinating works of Oliver Sacks.


TITLE: Las alucinaciones visuales en la obra de Oliver Sacks.Introducción. Las alucinaciones visuales constituyen una de las manifestaciones más singulares de diversas situaciones clínicas, ya sea en el ámbito de las enfermedades mentales, de las alteraciones físicas o del consumo de drogas. Sin embargo, el análisis detallado de su vivencia en relación con las causas que pueden producirlas es poco frecuente. Objetivo. Considerar la representación de las alucinaciones visuales en las publicaciones del neurólogo y escritor Oliver Sacks, con especial atención a su obra Hallucinations. Desarrollo. Las alucinaciones han llamado la atención de la cultura, la religión y el arte, lo que ha conllevado múltiples interpretaciones. El interés de Sacks por la percepción de las sensaciones le llevó a investigar los mecanismos por los que se producen las alucinaciones, debido al escaso conocimiento que se tenía sobre el tema. Las alucinaciones aparecieron ya en obras como Migraine, Awakenings o A leg to stand on. En Musicophilia abordó las alucinaciones auditivas, y en Hallucinations las consideró de forma monográfica. En esta última obra, Sacks analizó especialmente las presentes en el síndrome de Charles Bonnet, en situaciones de privación sensorial y en pacientes con epilepsia, las precipitadas por la levodopa y las causadas por drogas de abuso. Conclusiones. Hallucinations es una de las obras de Oliver Sacks con mayor contenido neurooftalmológico. La descripción de las alucinaciones de sus pacientes o las experimentadas en su propia piel y la reflexión sobre el mundo de la percepción hacen de Hallucinations una de las obras más fascinantes de Sacks.


Assuntos
Alucinações , Medicina na Literatura , História do Século XX , História do Século XXI , Humanos , Londres , Cidade de Nova Iorque
2.
Rev Neurol ; 67(5): 187-191, 2018 Sep 01.
Artigo em Espanhol | MEDLINE | ID: mdl-30047121

RESUMO

INTRODUCTION: The use of medical metaphors is common in the social discourse and in the media. However, the use by physicians themselves to define different concepts to the original meaning of the medical word is rare. AIM: To analyze the term «scotoma¼ in its metaphorical sense in the works of the neurologist and writer Oliver Sacks. DEVELOPMENT: Sacks used scotoma metaphorically in two works, in the autobiographical book A leg to stand on and in an essay Scotoma: forgetting and neglect in science. In the first case, he used it to define the sensorial loss of his leg after an accident, which could be interpreted as a «mental scotoma¼. In the second case, Sacks analyzed the process and the reasons of forgetting the works of some early scientific discoverers and discussed why this happened. In this case, Sacks made an analogy with the process suffered by scientific discoveries and the reasons why some of them are largely ignored, in a situation that he called «historical¼ or «social scotoma¼. CONCLUSIONS: Sacks does not use the term «scotoma¼ uniformly. When used to describe the sensorial loss of his leg, it might be considered that scotoma is there a second, although minor but accepted, meaning of the word. However, its use in the definition of historical neglect of early discoveries can be clearly defined as a medical metaphor in full sense.


TITLE: Los escotomas como metafora en la obra de Oliver Sacks.Introduccion. La utilizacion de metaforas medicas es frecuente en el discurso social y en los medios de comunicacion. Sin embargo, su empleo por los propios medicos para definir conceptos distintos al significado original del termino resulta poco habitual. Objetivo. Analizar el empleo del termino «escotoma¼, en su sentido metaforico, en las obras del neurologo y escritor Oliver Sacks. Desarrollo. Sacks uso escotoma metaforicamente en dos obras, en el libro autobiografico A leg to stand on y en un ensayo, Scotoma: forgetting and neglect in science. En el primer caso, lo utilizo para describir la situacion de perdida sensorial de su extremidad inferior, que experimento despues de un accidente, lo que podria interpretarse como un «escotoma mental¼. En el segundo caso, Sacks analizo el proceso y las razones del olvido de las obras de algunos descubridores cientificos precoces y comento por que habia sucedido, una situacion que denomino «escotoma historico¼ o «social¼. Conclusiones. Sacks no utiliza el termino «escotoma¼ de forma uniforme y, si bien en el caso de su accidente podria considerarse como una acepcion menor, pero aceptada, es indudable su uso como metafora medica para describir el olvido y la ignorancia de algunos descubrimientos cientificos en determinadas situaciones historicas.


Assuntos
Literatura Moderna , Medicina na Literatura , Metáfora , Neurologia/história , Escotoma/psicologia , Despersonalização/fisiopatologia , História do Século XX , História do Século XXI , Humanos , Perna (Membro)/inervação , Traumatismos da Perna/fisiopatologia , Traumatismos da Perna/psicologia , Londres , Los Angeles , Memória , New York , Transtornos da Percepção/fisiopatologia
3.
Ann Oncol ; 29(8): 1777-1783, 2018 08 01.
Artigo em Inglês | MEDLINE | ID: mdl-29893791

RESUMO

Background: Trastuzumab improves the outcome of women with HER2 positive breast cancer. We aimed to assess whether trastuzumab decreases the detection rate of circulating tumor cells (CTCs) in women with high risk, HER2 nonamplified, early breast cancer. Patients and methods: The EORTC 90091-10093 BIG 1-12 Treat CTC is a phase II trial, conducted in 70 hospitals and 6 CTC laboratories across 5 European countries. Patients with centrally confirmed HER2 nonamplified breast cancer and ≥1 centrally confirmed CTC per 15 ml of blood by CellSearch® following surgery and (neo)adjuvant chemotherapy were randomized (1 : 1) to 6 cycles of trastuzumab intravenously versus 18 weeks of observation. Randomization was stratified for center, locally confirmed estrogen receptor status and adjuvant versus neoadjuvant chemotherapy. The primary end point was rate of detection of ≥1 CTC per 15 ml of blood at week 18. Secondary end points were invasive disease-free survival (iDFS) and cardiac safety. Results: Between 30 April 2013 and 17 October 2016, 1317 patients were screened; 95 (7.2%) had detectable CTC(s), and 63 (4.8%) were randomized to trastuzumab (n = 31) or observation (n = 32). Fifty-eight patients were assessable for the primary end point, 29 in each arm. In 9 of the 58 patients, CTC(s) were still detected at week 18 : 5 in the trastuzumab and 4 in the observation arm (one-sided Fisher's exact test, P = 0.765). An Independent Data Monitoring Committee recommended stopping further accrual for futility for the primary end point. Median follow-up at database lock was 13 months (IQR 4-16.5). The 1-year iDFS was 93.8% (95% CI 77.3-98.4) in the observation versus 84.8% (95% CI 63.4-94.2) in the trastuzumab arm. No grade 2-4 cardiac events were observed in the trastuzumab arm. Conclusion: Trastuzumab does not decrease the detection rate of CTCs in HER2 nonamplified, nonmetastatic breast cancer.


Assuntos
Antineoplásicos Imunológicos/administração & dosagem , Neoplasias da Mama/terapia , Células Neoplásicas Circulantes/efeitos dos fármacos , Trastuzumab/administração & dosagem , Adulto , Idoso , Antineoplásicos Imunológicos/efeitos adversos , Mama/patologia , Mama/cirurgia , Neoplasias da Mama/sangue , Neoplasias da Mama/mortalidade , Cardiotoxicidade/epidemiologia , Cardiotoxicidade/etiologia , Quimioterapia Adjuvante/métodos , Intervalo Livre de Doença , Feminino , Humanos , Mastectomia , Pessoa de Meia-Idade , Receptor ErbB-2/antagonistas & inibidores , Receptor ErbB-2/metabolismo , Trastuzumab/efeitos adversos
4.
Ann Oncol ; 27(6): 1020-1029, 2016 06.
Artigo em Inglês | MEDLINE | ID: mdl-26916095

RESUMO

BACKGROUND: Maintenance strategies beyond response or tumor stabilization with first-line chemotherapy in metastatic breast cancer (MBC) have not been extensively studied. Endocrine therapy combined with continued bevacizumab may be a helpful option for estrogen receptor (ER)-positive MBC. PATIENTS AND METHODS: In this prospective, open-label, phase III study, patients with histologically confirmed ER-positive, HER2-negative MBC and non-progressive disease after 16-24 weeks of taxane plus bevacizumab (T + BEV) were randomized to continuation of T + BEV or maintenance bevacizumab plus exemestane (E + BEV). The primary end point was progression-free survival (PFS) from randomization. To have 80% power to detect an improvement in the 6-month PFS rate (PFS6m) from 50% to 65%, 186 assessable patients were needed for a total of 141 PFS events. An interim analysis was planned after 40% of the required events. RESULTS: The interim analysis with 98 patients showed that the probability of reaching a statistically significant improvement in PFS by the end of the study was only 7%. This led the Independent Data and Monitoring Committee to recommend termination of patient enrollment. After a median of 21-month follow-up of all randomized patients (117 in total), PFS6m from randomization was 67.2% [95% confidence interval (CI) 53.6-77.7] with T + BEV and 55.2% (95% CI 41.5-66.9) with E + BEV [hazard ratio (HR): 1.0, 95% CI 0.7-1.5, P = 0.998]. Median PFS from BEV initiation was 12.5 and 12.3 months in the T + BEV and E + BEV arms, respectively. In the T + BEV arm, taxane was prematurely stopped for the majority of patients (94.9%), mainly due to toxicity (49.2%). Updated data after 35 months' median follow-up showed death rates of 44% and 55% in T + BEV and E + BEV arms, respectively. CONCLUSION: In this trial, maintenance therapy with E + BEV in ER-positive, HER2-negative MBC patients with no evidence of progression after first-line T + BEV did not achieve longer PFS compared with continuation of T + BEV. CLINICALTRIALSGOV: NCT01303679.


Assuntos
Androstadienos/administração & dosagem , Bevacizumab/administração & dosagem , Neoplasias da Mama/tratamento farmacológico , Receptor alfa de Estrogênio/genética , Receptor ErbB-2/genética , Adulto , Idoso , Idoso de 80 Anos ou mais , Androstadienos/efeitos adversos , Bevacizumab/efeitos adversos , Neoplasias da Mama/genética , Neoplasias da Mama/patologia , Intervalo Livre de Doença , Efeitos Colaterais e Reações Adversas Relacionados a Medicamentos/genética , Efeitos Colaterais e Reações Adversas Relacionados a Medicamentos/patologia , Feminino , Humanos , Pessoa de Meia-Idade , Metástase Neoplásica
7.
J Geriatr Oncol ; 4(4): 394-401, 2013 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-24472485

RESUMO

OBJECTIVES: Our main aim was to describe and explore a multidisciplinary approach to the management of elderly patients with cancer, who constitute a heterogeneous population. MATERIALS AND METHODS: This descriptive study was performed between October 2009 and September 2010. Patients with cancer ≥ 70 years of age were included. Some underwent a simplified multidimensional geriatric assessment with a Charlson score administered by an oncologist, and the evaluation was submitted to a geriatrician who decided whether or not a complete a comprehensive geriatric assessment (CGA) (n=54) should be done. Another group of patients directly underwent a CGA (n=49), and a few patients included in a specific trial underwent a geriatric assessment (n=8). Each patient was classified as fit, vulnerable, or frail by a multidisciplinary team. RESULTS: 111 patients were included (median age: 81 years [range: 65-96]; 60 males). The most frequent types of cancer were lung (n=29), gastrointestinal (n=20) and head and neck (n=14). Median Charlson score was 2.1 [range: 0-9]. Standard therapy was given to 37/41 (90%) fit, 19/41 (42%) vulnerable, and 6/29 (21%) frail patients. Thirteen frail patients received best supportive care. A social worker was mobilized for 2/41 (5%) fit, 14/41 (34%) vulnerable, and 11/29 (38%) frail patients. CONCLUSIONS: Our study outlines the possibilities of cooperation between geriatricians and oncologists in a general hospital. This collaboration could modify therapeutic schedules especially in frail and vulnerable patients.


Assuntos
Avaliação Geriátrica/métodos , Serviços de Saúde para Idosos , Modelos Teóricos , Neoplasias/terapia , Idoso , Idoso de 80 Anos ou mais , Feminino , Idoso Fragilizado , França , Hospitais Gerais , Humanos , Masculino , Inquéritos e Questionários
8.
Br J Cancer ; 106(3): 460-7, 2012 Jan 31.
Artigo em Inglês | MEDLINE | ID: mdl-22173671

RESUMO

BACKGROUND: Intraperitoneal (IP) perioperative chemotherapy with cisplatin is an interesting option in ovarian cancer treatment. A combination of cisplatin with IP epinephrine (already shown to improve IP and decrease systemic platinum (Pt) exposure) was evaluated using a population pharmacokinetic analysis. METHODS: Data from 55 patients treated with cisplatin-based IP perioperative chemotherapy with (n=26) or without (n=29) epinephrine were analysed using NONMEM. RESULTS: Epinephrine halves clearance between peritoneum and serum (IPCL) and increases the Pt central volume of distribution, IP exposure and penetration in tissue. IPCL has a better predictive value than any other parameter with respect to renal toxicity. CONCLUSION: This confirms that IPCL could be useful in assessing renal toxicity. As IPCL is also linked to tissue penetration and IP exposure, it may be proposed as biomarker. In addition to a Bayesian estimation, we propose a single-sample calculation-way to assess it. Prospective studies are needed to validate IPCL as a biomarker in this context.


Assuntos
Antineoplásicos/administração & dosagem , Cisplatino/administração & dosagem , Epinefrina/administração & dosagem , Neoplasias Ovarianas/tratamento farmacológico , Neoplasias Ovarianas/cirurgia , Peritônio/metabolismo , Adulto , Idoso , Antineoplásicos/sangue , Antineoplásicos/farmacocinética , Biomarcadores/sangue , Biomarcadores/metabolismo , Quimioterapia Adjuvante , Cisplatino/sangue , Cisplatino/farmacocinética , Esquema de Medicação , Epinefrina/sangue , Epinefrina/farmacocinética , Feminino , Humanos , Injeções Intraperitoneais , Período Intraoperatório , Taxa de Depuração Metabólica , Pessoa de Meia-Idade , Modelos Biológicos , Neoplasias Ovarianas/patologia
9.
Gynecol Oncol ; 115(3): 382-8, 2009 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-19773043

RESUMO

OBJECTIVES: The aim of this phase II study was to assess the benefits of a weekly administration of topotecan and gemcitabine in patients with ovarian carcinoma having relapsed after platinum/taxane-based first-line chemotherapy. METHODS: Seventy-seven patients with progression of disease /=2 cycles administered). The only major severe toxicity was neutropenia grades 3 (17%) and 4 (6%). Approximately 60% of the patients received the complete schedule of treatment, dose interruptions/delays being mainly due to moderate thrombocytopenia or neutropenia. The objective response rate was 14%, the values for patients having relapsed within 6 (n=30) and 6-12 (n=36) months being 7% and 20%, respectively. Median durations of response were 4.9 and 6.4 months and clinical benefit rates including stabilizations reached 63% and 69% in patients having relapsed within 6 or 6-12 months, respectively. Corresponding median overall survival was 7.5 and 15.6 months. Symptoms and pain were reduced in 64% and 39% of the patients concerned, respectively. CONCLUSION: In early relapse ovarian cancer, weekly combination of gemcitabine and topotecan has a modest objective response rate. However, a high proportion of patients experienced stable disease and symptom control leading to acceptable quality of life.


Assuntos
Protocolos de Quimioterapia Combinada Antineoplásica/administração & dosagem , Neoplasias Ovarianas/tratamento farmacológico , Adulto , Idoso , Idoso de 80 Anos ou mais , Protocolos de Quimioterapia Combinada Antineoplásica/efeitos adversos , Desoxicitidina/administração & dosagem , Desoxicitidina/efeitos adversos , Desoxicitidina/análogos & derivados , Esquema de Medicação , Feminino , Humanos , Infusões Intravenosas , Pessoa de Meia-Idade , Qualidade de Vida , Topotecan/administração & dosagem , Topotecan/efeitos adversos , Resultado do Tratamento , Gencitabina
10.
Eur J Cancer ; 40(14): 2071-6, 2004 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-15341981

RESUMO

We report the results of a randomised phase II trial of docetaxel tested as a single agent in patients with recurrent head and neck cancer using methotrexate as a control arm to validate the results. Eligibility criteria included: histologically-confirmed squamous cell carcinoma, measurable disease, adequate haematological, renal and hepatic functions, no prior chemotherapy for recurrent cancer, signed informed consent. 40 mg/m2 methotrexate was given as a short weekly bolus i.v. injection, and 40 mg/m2 docetaxel was administered as a one hour weekly infusion. A total of 57 patients were randomised based on a ratio of 2/1:37 and 20 patients received docetaxel and methotrexate, respectively. Patient characteristics included 49 males and 8 females; the median age was 59 years (range: 43-82 years). Twenty-eight patients had a local-regional relapse and 29 had distant metastasis, the median disease-free interval was 7.9 months (range: 0-165 months). For patients treated with docetaxel, the following grade 3-4 toxicities occurred: neutropenia (12.5%) with febrile neutropenia in one patient (1%), anaemia (19%) mucositis (9%) and ungueal toxicity (9%). In the methotrexate arm, the grade 3-4 toxicities were: anaemia (15%) and mucositis (5%). The response rate was significantly higher in the docetaxel arm with 27% (95% confidence interval (CI): 21.7-32.3%) of objective responses versus 15% (95% CI: 11.2-18.8%) in the methotrexate arm. Overall survival and time to progression were super-imposable between the docetaxel and methotrexate treatments. Docetaxel given as a weekly infusion has a high activity in patients with head and neck cancer. A phase III trial is needed to test if this translates into a survival benefit for docetaxel use.


Assuntos
Antimetabólitos Antineoplásicos/uso terapêutico , Antineoplásicos Fitogênicos/uso terapêutico , Carcinoma de Células Escamosas/tratamento farmacológico , Neoplasias de Cabeça e Pescoço/tratamento farmacológico , Metotrexato/uso terapêutico , Recidiva Local de Neoplasia/tratamento farmacológico , Taxoides/uso terapêutico , Adulto , Idoso , Idoso de 80 Anos ou mais , Antimetabólitos Antineoplásicos/efeitos adversos , Antineoplásicos Fitogênicos/efeitos adversos , Docetaxel , Feminino , Humanos , Masculino , Metotrexato/efeitos adversos , Pessoa de Meia-Idade , Análise de Sobrevida , Taxoides/efeitos adversos , Resultado do Tratamento
12.
Ann Oncol ; 14(10): 1578-86, 2003 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-14504061

RESUMO

The combination of cisplatin and 5-fluorouracil (5-FU) is considered to be the standard treatment in induction chemotherapy for patients with squamous cell carcinoma of the head and neck. Capecitabine (Xeloda) is an oral fluoropyrimidine that is preferentially activated at the tumoral level, exploiting the higher thymidine phosphorylase activity in tumoral tissue. This phase I trial was conducted in patients with locally recurrent or metastatic head and neck carcinoma. The treatment plan included cisplatin on day 1 every 21 days, followed by capecitabine twice daily from day 2 to day 15, with a 1-week rest period. Pharmacokinetic investigations concerned plasma measurement of unchanged capecitabine, 5'-deoxy-5-fluorocytidine, 5'-doxifluridine and 5-FU using an optimized high performance liquid chromatography method, and cisplatin measurement in plasma using a limited sampling procedure. Twenty-one patients were included (mean age 61 years, range 46-76 years). Dose (mg/m(2)) increments for cisplatin and capecitabine (b.i.d.), respectively, were as follows: level 1, 80 and 1000 (three patients); level 2, 100 and 1000 (12 patients); and level 3, 100 and 1125 (five patients). Dose-limiting toxicities occurring during the first cycle (grade >/= 3) were observed on level 2 (one patient with diarrhea, nausea, vomiting, hand-foot syndrome, one toxic death due to renal failure and neutropenia, one patient with neutropenia) and on level 3 (one patient with diarrhea, one patient with hand-foot syndrome and one patient with neutrothrombocytopenia). Due to delayed side-effects, 14 patients (67%) had repeated cycles every 28 days instead of 21 days as initially planned. Objective response was obtained in seven patients (three complete responses and four partial responses). There was no evidence of pharmacokinetic-pharmacodynamic relationships with the drugs and metabolites investigated. Combination of capecitabine and cisplatin is feasible, with a very promising response rate. The recommended doses for further phase II studies are those of level 2 with cisplatin 100 mg/m(2) on day 1 and capecitabine 1000 mg/m(2) b.i.d. on days 1-14, every 28 days.


Assuntos
Protocolos de Quimioterapia Combinada Antineoplásica/efeitos adversos , Protocolos de Quimioterapia Combinada Antineoplásica/farmacocinética , Desoxicitidina/análogos & derivados , Neoplasias de Cabeça e Pescoço/tratamento farmacológico , Administração Oral , Idoso , Protocolos de Quimioterapia Combinada Antineoplásica/administração & dosagem , Capecitabina , Cromatografia Líquida de Alta Pressão , Cisplatino/administração & dosagem , Cisplatino/efeitos adversos , Desoxicitidina/administração & dosagem , Desoxicitidina/efeitos adversos , Feminino , Fluoruracila/análogos & derivados , Neoplasias de Cabeça e Pescoço/patologia , Humanos , Infusões Intravenosas , Masculino , Dose Máxima Tolerável , Pessoa de Meia-Idade , Recidiva Local de Neoplasia/tratamento farmacológico , Recidiva Local de Neoplasia/patologia , Resultado do Tratamento
14.
Cancer Radiother ; 7(3): 195-9, 2003 Jun.
Artigo em Francês | MEDLINE | ID: mdl-12834777

RESUMO

Epidermal Growth Factor receptor (EGFR) are a key factor for the tumoral proliferation and its tumoral over expression appears to be a powerful prognosis factor. Currently, 2 types of treatments are targeting EGFR: a monoclonal antibodies anti-EGFR and a specific inhibitors of the EGFR tyrosine kinase. The administration of these compound alone or in combination with chemotherapy gives some promising results. These targets as anti-cancer therapy had emerged to be a new perspective for oncology.


Assuntos
Anticorpos Monoclonais/uso terapêutico , Antineoplásicos/uso terapêutico , Receptores ErbB/antagonistas & inibidores , Neoplasias/tratamento farmacológico , Proteínas Tirosina Quinases/antagonistas & inibidores , Anticorpos Monoclonais Humanizados , Biópsia , Transformação Celular Neoplásica/efeitos dos fármacos , Cetuximab , Ensaios Clínicos como Assunto , Receptores ErbB/análise , Receptores ErbB/fisiologia , Gefitinibe , Regulação Neoplásica da Expressão Gênica/efeitos dos fármacos , Regulação Neoplásica da Expressão Gênica/fisiologia , Humanos , Neoplasias/etiologia , Neoplasias/mortalidade , Neoplasias/patologia , Panitumumabe , Prognóstico , Quinazolinas , Transdução de Sinais/efeitos dos fármacos , Análise de Sobrevida , Resultado do Tratamento
15.
Ann Oncol ; 14(4): 643-7, 2003 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-12649114

RESUMO

BACKGROUND: Carboplatin is the only cancer drug for which conventional doses are individually adjusted according to estimated clearance and target area under the curve (AUC). The aim of this prospective study was (i) to evaluate intra- and interpatient variability of ultrafilterable (UF) carboplatin AUC(0-)(infinity) and (ii) to test whether the prediction of carboplatin clearance according to the Chatelut formula established for conventional carboplatin doses was accurate for low carboplatin doses. MATERIALS AND METHODS: Thirty-one head and neck cancer patients (29 men, two women, mean age 55.9 years) received concomitant radiotherapy (Rgamma 2 Gy/day) and chemotherapy (carboplatin 50 mg/m(2)/day i.v.) for 7 weeks: Rgamma was administered 5 days/week (days 1-5) and carboplatin 2 days/week (days 1 and 4). Pharmacokinetics was performed once per week. A limited sample strategy based on Bayesian analysis was first validated and blood was subsequently taken 1 and 4 h after the end of carboplatin administration. RESULTS: A total of 143 cycles was analyzed. Ultrafilterable carboplatin AUC(0-)(infinity) ranged from 0.360 to 4.200 mg.min/ml (mean 0.830, median 0.670). As a corollary, UF carboplatin clearance ranged from 19.1 to 244.7 ml/min. Ultrafilterable carboplatin concentrations were very stable over time: AUC(0-)(infinity) variability due to treatment duration contributed to <1% of the total variance, while interpatient variability contributed to 68.6%. Accordingly, intrasubject effect was not significant (P = 0.38) whereas intersubject effect was highly significant (P <0.001). These results suggest that optimal dosage for targeting a given AUC may vary within a 13-fold range between patients. The Chatelut formula, based on creatininemia, body weight, age and sex, over estimates carboplatin clearance by 40% on average (bias 95% CI 29.6% to 51.1%). No significant relationship was observed between either bone marrow toxicity or creatinine clearance decrease and carboplatin pharmacokinetics. CONCLUSIONS: The Chatelut carboplatin clearance model established for conventional carboplatin dosages (>100 mg/m(2)) is not applicable for targeting low AUC (<1 mg x min/ml).


Assuntos
Antineoplásicos/administração & dosagem , Antineoplásicos/farmacocinética , Carboplatina/administração & dosagem , Carboplatina/farmacocinética , Neoplasias de Cabeça e Pescoço/tratamento farmacológico , Modelos Teóricos , Adulto , Idoso , Antineoplásicos/farmacologia , Área Sob a Curva , Teorema de Bayes , Carboplatina/farmacologia , Relação Dose-Resposta a Droga , Feminino , Filtração , Neoplasias de Cabeça e Pescoço/patologia , Humanos , Infusões Intravenosas , Masculino , Pessoa de Meia-Idade , Reprodutibilidade dos Testes
16.
Ann Oncol ; 14(3): 373-7, 2003 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-12598340

RESUMO

BACKGROUND: The purpose of this study was to carry out two randomised phase II trials of S16020, a new olivacine derivative, tested as a single agent in patients with recurrent head and neck cancer, using methotrexate as the control arm to validate the results. PATIENTS AND METHODS: S16020 at either 80 or 100 mg/m2 was administered as a 3-h infusion every 3 weeks. Methotrexate, 40 or 50 mg/m2, was given by bolus injection, weekly for a minimum of 6 weeks. In total, 36 patients were entered in the randomised studies (25 in an initial study, 11 in a confirmatory study) of whom 24 received S16020 and 12 received methotrexate. RESULTS: A scheduled interim analysis showed one patient having a non-confirmed objective response with S16020 and three patients having a confirmed objective response with methotrexate. In the methotrexate group, there were no patients with severe non-haematological toxicity. With S16020, there was a high incidence of severe non-haematological toxicities, including asthenia, oedema of the face, oedema and pain at the tumour sites and erythematous rash; consequently, both studies were stopped. CONCLUSIONS: Both studies were stopped due to the poor anticipated benefit/risk ratio for S16020, although time to progression and overall survival time were similar in both treatment arms.


Assuntos
Antimetabólitos Antineoplásicos/efeitos adversos , Antimetabólitos Antineoplásicos/uso terapêutico , Carbazóis/efeitos adversos , Carbazóis/uso terapêutico , Neoplasias de Cabeça e Pescoço/tratamento farmacológico , Metotrexato/efeitos adversos , Metotrexato/uso terapêutico , Recidiva Local de Neoplasia/tratamento farmacológico , Piridinas/efeitos adversos , Piridinas/uso terapêutico , Adulto , Idoso , Antimetabólitos Antineoplásicos/administração & dosagem , Carbazóis/administração & dosagem , Progressão da Doença , Esquema de Medicação , Edema/etiologia , Feminino , Neoplasias de Cabeça e Pescoço/patologia , Humanos , Infusões Intravenosas , Injeções Intravenosas , Masculino , Metotrexato/administração & dosagem , Pessoa de Meia-Idade , Recidiva Local de Neoplasia/patologia , Piridinas/administração & dosagem , Análise de Sobrevida , Resultado do Tratamento
17.
Eur J Cancer ; 37(17): 2169-77, 2001 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-11677103

RESUMO

The aim of this study was to analyse prognostic factors for time to treatment failure (TTF) and overall survival (OS) in patients with unresectable cancer of the pharynx. A twice daily (b.i.d.) radiotherapy with concomitant cisplatin-5-fluorouracil chemotherapy was administered to 77 consecutive patients (68 males, 9 females; median age: 56 years). The studied factors were: age, gender, tumour differentiation, tumour volume, initial hemoglobin level, karnofsky index (KI), primary tumour location, T, N, epidermal growth factor receptor (EGFR) level in the tumour (fmol/mg protein). KI and EGFR level were significant predictors in a multivariate analysis for TTF (P=0.004 and P=0.0001) and OS (P=0.004 and P=0.0001). In order to select subgroups with different outcomes, a stratification of patients was performed based on the EGFR value: patients with tumour EGFR levels <35 fmol/mg protein, between 35 and 275 fmol/mg protein and >275 fmol/mg protein had 95%, 51% and 16% 3 year OS rates, respectively (log rank test; P=0.0001). Interestingly, for patients exhibiting a complete response (CR) after concomitant b.i.d. chemo-radiotherapy, patients with EGFR levels <35 fmol/mg protein were all alive at 3 years; in contrast, there was only 70 and 13% 3 year survival rates for patients with EGFR tumour levels between 35 and 275 fmol/mg protein and above 275 fmol/mg protein, respectively. EGFR determination appears to be a powerful prognostic parameter in unresectable pharyngeal cancer patients treated by concomitant chemo-radiotherapy.


Assuntos
Biomarcadores Tumorais/metabolismo , Carcinoma de Células Escamosas/metabolismo , Receptores ErbB/metabolismo , Neoplasias Faríngeas/metabolismo , Adulto , Idoso , Protocolos de Quimioterapia Combinada Antineoplásica/uso terapêutico , Carcinoma de Células Escamosas/tratamento farmacológico , Carcinoma de Células Escamosas/radioterapia , Terapia Combinada , Feminino , Humanos , Modelos Logísticos , Masculino , Pessoa de Meia-Idade , Proteínas de Neoplasias/metabolismo , Neoplasias Faríngeas/tratamento farmacológico , Neoplasias Faríngeas/radioterapia , Prognóstico , Taxa de Sobrevida , Resultado do Tratamento
18.
Oncology ; 61(3): 197-204, 2001.
Artigo em Inglês | MEDLINE | ID: mdl-11574775

RESUMO

The purpose of our study was to determine the clinical prognostic factors for the duration of the overall survival from recurrence (OSR) in patients with recurrent head and neck squamous-cell carcinoma. We performed a retrospective analysis on 496 patients treated between 1982 and 1993 at the Antoine Lacassagne Center. The significant favorable prognostic factors for the OSR were: initial T(1-2) (p = 0.008), no initial nodal involvement (p = 0.002), no initial chemotherapy exposure (p = 0.002), induction chemotherapy response (p = 0.001), duration of disease-free interval (DFI; p = 0.0001), performance status (PS) 0-1 (p = 0.004) and local-regional recurrence (p = 0.001). In the multivariate analysis, the apparent nonsignificance of all factors apart from the DFI suggested that relevant prognostic factors could be embedded in the DFI. Multivariate analysis was performed after excluding the DFI. The results indicated that local-regional recurrence, PS 0-1 and no initial chemotherapy exposure remained significant favorable prognostic factors for the OSR. The advantages of taking into account such prognostic factors are to eliminate the patient selection bias and to ensure a fairer comparative evaluation of new or already existing agents in recurrent head and neck cancer.


Assuntos
Carcinoma de Células Escamosas/mortalidade , Neoplasias de Cabeça e Pescoço/mortalidade , Recidiva Local de Neoplasia/epidemiologia , Seleção de Pacientes , Ensaios Clínicos Controlados Aleatórios como Assunto/estatística & dados numéricos , Adulto , Idoso , Protocolos de Quimioterapia Combinada Antineoplásica/uso terapêutico , Carcinoma de Células Escamosas/terapia , Terapia Combinada , Progressão da Doença , Intervalo Livre de Doença , Feminino , Neoplasias de Cabeça e Pescoço/terapia , Humanos , Tábuas de Vida , Modelos Lineares , Masculino , Pessoa de Meia-Idade , Análise Multivariada , Metástase Neoplásica , Prognóstico , Radioterapia , Fatores de Risco , Análise de Sobrevida , Falha de Tratamento
19.
Am J Clin Oncol ; 24(4): 372-5, 2001 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-11474265

RESUMO

The purpose of this report is to evaluate toxicity, response, and survival of the cyclophosphamide-doxorubicin-cisplatin (CAP) chemotherapy regimen in patients with adenocarcinoma of unknown primary site (ACUP). Twenty-two patients with ACUP were eligible for this study between June 1992 and April 1999. There were 13 men (59%) and 9 women (41%) with a median age of 53.5 years (range: 29--78 years). Lung (seven), liver (six), vertebral bone site (six), and abdominal nodes (six) were the most common metastatic sites. Treatment consisted of doxorubicin 50 mg/m(2), cyclophosphamide 1,000 mg/m(2), and cisplatin 100 mg/m(2) (CAP), administered every 3 weeks; a total of six courses were planned. Twenty-two patients were assessable for toxicity and 20 patients were assessable for response. Grade III to IV neutropenia was observed in 14 patients (64%); febrile neutropenia occurred in 6 patients (27%) and in 10 cycles (12.5%). Grade III to IV anemia and thrombocytopenia were found in 12 (54.5%) and 9 patients (41%), respectively. Grade III to IV nausea and vomiting was observed in 9 patients (41%). Ten patients, 50% of the assessable population, obtained an objective response, including 3 complete (15%) and 7 partial (35%) responses. The median response duration was 3.9 months (range: 0.5--13.3 months). One patient (5%) had stable disease and 5 patients (25%) had progressive disease. The median overall survival and the median time to progression were 10.7 months (range: 0.4--56.9 months) and 8.8 months (range: 6.6--16.5 months), respectively. The CAP regimen in patients with ACUP had significant activity. This chemotherapy regimen induced a high level of grade III to IV toxicities and could not be considered as a treatment of reference. However, the emergence of long-term survivors among responder patients highlighted the need to search for an active treatment for patients with ACUP.


Assuntos
Adenocarcinoma/tratamento farmacológico , Protocolos de Quimioterapia Combinada Antineoplásica/uso terapêutico , Neoplasias Primárias Desconhecidas/tratamento farmacológico , Adulto , Idoso , Protocolos de Quimioterapia Combinada Antineoplásica/administração & dosagem , Cisplatino/administração & dosagem , Ciclofosfamida/administração & dosagem , Doxorrubicina/administração & dosagem , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Análise de Sobrevida
20.
Head Neck ; 23(8): 678-82, 2001 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-11443751

RESUMO

BACKGROUND: The purpose of this study is to make a comparative analysis between acute toxicity with late toxicity. This study is based upon a French quality of life (QoL) questionnaire in a cohort of advanced head and neck (H&N) cancer patients treated by concomitant twice-a-day continuous radiotherapy with no acceleration and chemotherapy with cisplatin and 5-fluorouracil. METHODS: From September 1992 to November 1997, a prospective data bank of 91 patients was constituted. In November 1999, 31 patients were still alive and followed for more than 3 years. All patients had stage IV strictly unresectable squamous cell carcinoma of oropharynx or hypopharynx. A French specific H&N cancer QoL questionnaire was used at the end of radiotherapy and at the last date of follow-up of each patient (during 1999). p values reflect comparison of percentages obtained at the end of treatment with percentages at long-term follow-up. Statistical analysis was performed using chi(2) test (p <.05 considered as significant). Percentages obtained by the QoL questionnaire correspond to moderate-severe problems only. RESULTS: Twenty-nine of 31 (94%) patients participated in the QoL study. Acute treatment toxicities were severe with declines in virtually all QoL and functional domains. Globally, with an average long-term follow-up of 4.5 years (range 3-7 years after treatment), there is a statistical improvement in the following symptoms: dry mouth and sticky saliva (97% versus 55%, p <.05); tasting problems (35% versus 21%, not significant); swallowing problems (77% versus 36%, p <.05); and H&N pain (86% versus 9%, p <.05). Financial problems were not improved (21% versus 14%, not significant), and psychological problems (59% versus 5%) were statistically significant. Fourteen of 29 (48%) patients were drinking and 8 of 29 (28%) were smoking at long-term follow-up; at the diagnosis they were 86% and 90%, respectively. At long-term follow-up 22 of 29 presented good or very good QoL, and 25 of 29 said they had improved their initial QoL. CONCLUSION: The interest of twice-a-day radiotherapy with concomitant chemotherapy is to increase total radiotherapy equivalent dose without increasing late toxicity and also to improve locoregional control, survival, and long-term QoL/effectiveness ratio. Best supportive care is recommended to obtain both good QoL and cancer control in a long-term follow-up.


Assuntos
Carcinoma de Células Escamosas/tratamento farmacológico , Carcinoma de Células Escamosas/radioterapia , Neoplasias Hipofaríngeas/tratamento farmacológico , Neoplasias Hipofaríngeas/radioterapia , Neoplasias Orofaríngeas/tratamento farmacológico , Neoplasias Orofaríngeas/radioterapia , Qualidade de Vida , Adulto , Idoso , Protocolos de Quimioterapia Combinada Antineoplásica/uso terapêutico , Carcinoma de Células Escamosas/patologia , Cisplatino/uso terapêutico , Nutrição Enteral , Feminino , Fluoruracila/uso terapêutico , Gastrostomia , Humanos , Neoplasias Hipofaríngeas/patologia , Masculino , Pessoa de Meia-Idade , Estadiamento de Neoplasias , Neoplasias Orofaríngeas/patologia , Dosagem Radioterapêutica
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