Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 6 de 6
Filtrar
Mais filtros










Base de dados
Intervalo de ano de publicação
1.
Radiother Oncol ; 2022 Jan 05.
Artigo em Inglês | MEDLINE | ID: mdl-34998900

RESUMO

BACKGROUND: Salvage radiotherapy (RT) is a potentially curative approach for advanced locally recurrent nasopharyngeal carcinoma (NPC), but it is associated with severe toxicities. We aimed to develop a model to predict which patients would benefit from salvage RT. METHODS: A total of 809 patients who were diagnosed with advanced locally recurrent NPC and treated with salvage RT or palliative chemotherapy (CT) at a high-volume cancer center were included. Patients were randomly split into a training and validation set and matched using inverse probability of treatment weighting. The primary outcome was overall survival (OS). Candidate variables associated with heterogeneous treatment effects were identified with interaction terms in Cox model and incorporated into Salvage Radiotherapy Outcome Score (SARTOS). RESULTS: The final model included five interaction terms indicating that female sex, presence of prior RT-induced grade≥3 late toxicities and suboptimal performance status were associated with less benefit from salvage RT. SARTOS from the model significantly predicted treatment effects of salvage RT in matched training (Pinteration<0.001) and validation cohorts (Pinteration=0.027). Of patients in high SARTOS subgroup, salvage RT significantly improved survival versus palliative CT in matched training (3-year OS 67.3% vs. 42.0%, HR 0.51, 95% CI 0.32-0.82, P=0.005) and validation cohorts (3-year OS 71.8% vs. 22.8%, HR 0.40, 95% CI 0.17-0.97, P=0.042); in low SARTOS subgroup, salvage RT failed to induce survival benefit. CONCLUSIONS: We found that the SARTOS model could identify a subgroup of patients who benefit from salvage RT versus palliative CT, which helps personalize treatment recommendations for patients with recurrent NPC.

2.
Eur J Cancer ; 159: 133-143, 2021 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-34743068

RESUMO

PURPOSE: To compare the prognosis and adverse effects of induction or adjuvant chemotherapy (IC or AC) plus concurrent chemoradiotherapy (CCRT) versus CCRT alone in paediatric nasopharyngeal carcinoma (NPC) patients in the intensity-modulated radiotherapy (IMRT) era. METHODS AND MATERIALS: 549 patients diagnosed from 2005 to 2021 were enrolled. Our primary endpoint was progression-free survival (PFS). The recursive partitioning analysis (RPA) was applied to derive a risk stratification system. Kaplan-Meier survival curves were used to assess the cumulative survival rates, and cox analysis was applied to evaluate the relationship between variables and endpoints. RESULTS: The RPA-based risk stratification identified three different risk groups. In the intermediate-risk (stage IVa and EBV<4000 copies/ml) group, patients who received IC followed by CCRT achieved a significantly better 3-year PFS rate than those treated with CCRT alone (87.35% versus 75.89%; P = 0.04). But survival benefit was not obtained from the additional IC or AC in the low-risk (stage II-III and EBV<4000 copies/ml) or high-risk (stage II-IVa and EBV≥4000 copies/ml) group. The most common grade 3 or 4 adverse events in patients treated with CCRT, IC + CCRT, and CCRT + AC were neutropenia (8.1%, 33.0% versus 36.9%, respectively) and leukopenia (14.1%, 26.8% versus 32.3%, respectively) with statistically significant difference. CONCLUSIONS: Paediatric NPC patients in the intermediate-risk group treated with IC followed by CCRT had significantly better PFS compared with patients treated with CCRT alone. And the overall incidence of acute adverse events in patients treated with IC or AC plus CCRT was higher than in patients treated with CCRT alone.

3.
SAGE Open Med Case Rep ; 9: 2050313X211057704, 2021.
Artigo em Inglês | MEDLINE | ID: mdl-34777811

RESUMO

Alpha-fetoprotein hardly increased due to nasopharyngeal cancer. In this article, we reported a 57-year-old male nasopharyngeal carcinoma patient who had posttreatment subscapular metastasis with high serum alpha-fetoprotein but negative plasma Epstein-Barr virus DNA. Pathology results indicated that the scapular mass was undifferentiated non-keratinizing carcinoma originated in the nasopharynx. Moreover, no liver lesion was detected by imaging examination. In view of the positive alpha-fetoprotein and alpha-fetoprotein messenger RNA staining result in the right scapular mass fine needle aspiration biopsy sample, we considered the diagnosis of alpha-fetoprotein-producing nasopharyngeal carcinoma that had never been reported before.

4.
Radiother Oncol ; 163: 185-191, 2021 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-34453953

RESUMO

BACKGROUND: Unsatisfactory tumor response to induction chemotherapy (IC) is an adverse prognostic factor of locoregionally advanced nasopharyngeal carcinoma (LANPC). A re-induction strategy which applies additional cycles of an alternative IC regimen prior to radiotherapy (RT) has been adopted. METHODS: A total of 419 LANPC patients who attained suboptimal response (stable disease or disease progression) according to the Response Evaluation in Solid Tumors (RECIST) guideline after initial IC were retrospectively included. They were divided into those who received additional cycles of re-induction regimen prior to RT (re-induction group, n = 87) and those who had no additional chemotherapy (direct to RT group, n = 332). Propensity score matching (PSM) was used to adjust for potential confounders. Tumor response and long-term survival were compared between two groups. RESULTS: After receiving a second IC regimen, 39.1% of the patients in re-induction group attained partial response; however, the tumor control of subsequent RT was not significantly improved when compared with direct to RT group (patients attaining complete response after RT 55.2% vs. 52.5%, P = 0.757). Patients who received re-induction therapy showed worse locoregional relapse-free survival (LRFS) and progression-free survival (PFS) than those proceeded directly to RT (3-year LRFS 75.7% vs. 83.1%, P = 0.005; 3-year PFS 62.4% vs. 68.3%, P = 0.037). The increased hematological toxicities were observed in re-induction group that included grade 3-4 anemia, thrombocytopenia and liver enzyme increase. CONCLUSION: Re-induction therapy decreased LRFS and PFS and increased toxicities among patients who attain suboptimal response to initial IC regimen, as compared with direct to RT strategy.

5.
Int J Radiat Oncol Biol Phys ; 105(3): 581-590, 2019 11 01.
Artigo em Inglês | MEDLINE | ID: mdl-31319091

RESUMO

PURPOSE: Previous studies demonstrated that the radiation therapy, image technology, and the application of chemotherapy have developed in the last 2 decades. This study explored the survival trends and treatment failure patterns of patients with nonmetastatic nasopharyngeal carcinoma (NPC) treated with radiation therapy. Furthermore, we evaluated the survival benefit brought by the development of radiation therapy, image technology, and chemotherapy based on a large cohort from 1990 to 2012. METHODS AND MATERIALS: Data from 20,305 patients with nonmetastatic NPC treated between 1990 and 2012 were analyzed. Patients were divided into 4 calendar periods (1990-1996, 1997-2002, 2003-2007, and 2008-2012). Overall survival (OS) was the primary endpoint. RESULTS: Magnetic resonance imaging has replaced computed tomography as the most important imaging technique since 2003. Conventional 2-dimensional radiation therapy, which was the main radiation therapy technique in our institution before 2008, was replaced by intensity modulated radiation therapy later. An increasing number of patients have undergone chemotherapy since 2003. The 5-year OS across the 4 calendar periods increased at each TNM stage with progression-free survival (PFS) and locoregional relapse-free survival (LRFS) showing a similar trend, whereas distant metastasis-free survival showed small differences. Multivariate analyses showed that the application of intensity modulated radiation therapy and magnetic resonance imaging were independent protective factors in OS, PFS, LRFS, and distant metastasis-free survival. Chemotherapy benefited patients in OS, PFS, and LRFS. The main pattern of treatment failure shifted from recurrence to distant metastasis. CONCLUSIONS: The development of radiation therapy, image technology, and chemotherapy increased survival rates among patients with NPC because of excellent locoregional control. Distant failure has become the greatest challenge for NPC treatment.


Assuntos
Carcinoma Nasofaríngeo/mortalidade , Carcinoma Nasofaríngeo/radioterapia , Neoplasias Nasofaríngeas/mortalidade , Neoplasias Nasofaríngeas/radioterapia , Adolescente , Adulto , Idoso , Idoso de 80 Anos ou mais , Antineoplásicos/uso terapêutico , Protocolos de Quimioterapia Combinada Antineoplásica/uso terapêutico , Criança , Estudos de Coortes , DNA Viral/sangue , Feminino , Humanos , Imageamento por Ressonância Magnética/mortalidade , Imageamento por Ressonância Magnética/tendências , Masculino , Pessoa de Meia-Idade , Análise Multivariada , Carcinoma Nasofaríngeo/diagnóstico por imagem , Carcinoma Nasofaríngeo/tratamento farmacológico , Neoplasias Nasofaríngeas/diagnóstico por imagem , Neoplasias Nasofaríngeas/tratamento farmacológico , Recidiva Local de Neoplasia/mortalidade , Papillomaviridae/genética , Prognóstico , Intervalo Livre de Progressão , Radioterapia/métodos , Radioterapia/mortalidade , Radioterapia/tendências , Radioterapia de Intensidade Modulada/mortalidade , Radioterapia de Intensidade Modulada/tendências , Taxa de Sobrevida , Fatores de Tempo , Tomografia Computadorizada por Raios X/tendências , Falha de Tratamento , Adulto Jovem
6.
Yao Xue Xue Bao ; 47(9): 1134-40, 2012 Sep.
Artigo em Chinês | MEDLINE | ID: mdl-23227541

RESUMO

This study is to establish an artificial neural network (ANN) for predicting blood tacrolimus concentration in liver transplantation recipients. Tacrolimus concentration samples (176 samples) from 37 Chinese liver transplantation recipients were collected. ANN established after network parameters were optimized by using momentum method combined with genetic algorithm. Furthermore, the performance of ANN was compared with that of multiple linear regression (MLR). When using accumulated dose of 4 days before therapeutic drug monitoring (TDM) of tacrolimus concentration as input factor, mean prediction error and mean absolute prediction error of ANN were 0.02 +/- 2.40 ng x mL(-1) and 1.93 +/- 1.37 ng x mL(-1), respectively. The absolute prediction error of 84.6% of testing data sets was less than 3.0 ng x mL(-1). Accuracy and precision of ANN are superior to those of MLR. The correlation, accuracy and precision of ANN are good enough to predict blood tacrolimus concentration.


Assuntos
Monitoramento de Medicamentos/métodos , Imunossupressores/sangue , Transplante de Fígado , Redes Neurais de Computação , Tacrolimo/sangue , Adulto , Idoso , Feminino , Humanos , Modelos Lineares , Masculino , Pessoa de Meia-Idade
SELEÇÃO DE REFERÊNCIAS
DETALHE DA PESQUISA
...