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1.
J Cancer Res Clin Oncol ; 149(10): 7427-7439, 2023 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-36947237

RESUMO

BACKGROUND: Radiation-induced oral mucositis (OM) largely impairs the quality of life (QoL) of patients with head and neck cancer (HNC). Few choices with limited efficacy are available to prevent this adverse effect. This randomized trial was conducted to compare the efficacy of benzydamine (standard) and a new combination (sumac and rose water) in preventing radiation-induced OM. METHODS: This was a phase II, triple-blind, active-controlled, randomized trial. The primary endpoint was OM, and the secondary endpoints were oral pain and QoL. Besides, the possible variables defining the outcomes were analyzed using the chi-squared test (univariate analysis) and binomial regression model (multivariate analysis). RESULTS: Sumac-rose group had fewer high-grade OM (33% vs. 63%, odds ratio [OR] 0.28, 95% confidence interval [CI 95%] 0.08-0.93, P = 0.03) and better QoL (P < 0.05). Multivariate analysis confirmed these findings. Sumac-rose rinsing could also postpone the start of oral pain (hazard ratio [HR] 0.02, CI 95% 0.001-0.32, P = 0.001) and high-grade OM (HR 0.28, P = 0.03) compared with benzydamine. CONCLUSIONS: The sumac-rose group had a lower OM rate and grade and higher QoL than the benzydamine group. In addition, the experimental group developed high-grade OM and oral pain later during the radiotherapy course. Further studies need to be conducted to assess the role of sumac and rose water in reducing grade 3-4 mucositis in patients who undergo chemoradiation for head and neck cancer.


Assuntos
Benzidamina , Neoplasias de Cabeça e Pescoço , Lesões por Radiação , Rhus , Estomatite , Humanos , Benzidamina/uso terapêutico , Antissépticos Bucais/uso terapêutico , Qualidade de Vida , Estomatite/etiologia , Estomatite/prevenção & controle , Neoplasias de Cabeça e Pescoço/radioterapia , Dor , Água , Método Duplo-Cego
2.
Indian J Cancer ; 60(3): 418-426, 2023.
Artigo em Inglês | MEDLINE | ID: mdl-36861690

RESUMO

Background: The efficacy of chemotherapy in locally advanced, recurrent, and metastatic salivary gland carcinomas (LA-R/M SGCs) is still undefined. We aimed to compare the efficacy of two chemotherapy regimens in LA-R/M SGC. Materials and Methods: This prospective study compared paclitaxel (Taxol) plus carboplatin (TC) versus cyclophosphamide, doxorubicin, plus cisplatin (CAP) regimen in terms of overall response rate (ORR), clinical benefit rate (CBR), progression-free survival (PFS), and overall survival (OS). Results: Between October 2011 and April 2019, 48 patients with LA-R/M SGCs were recruited. The ORRs of first-line TC and CAP regimens were 54.2% and 36.3%, respectively (P = 0.57). The ORRs in recurrent and de novo metastatic patients were 50.0% and 37.5% for TC and CAP, respectively (P = 0.26). The median PFS of TC and CAP arms were 10.2 and 11.9 months, respectively (P = 0.91). In the subanalysis, patients with adenoid cystic carcinoma (ACC) had longer PFS in the TC arm (14.5 vs. 8.2 months, P = 0.03), irrespective of the tumor grade (low grade: 16.3 vs. 8.9 months, high grade: 11.7 vs. 4.5 months; P = 0.03). The median OS rates were 45.5 and 19.5 months for TC and CAP groups, respectively (P = 0.71). Conclusion: For patients with LA-R/M SGC, there was no significant difference between first-line TC and CAP in terms of ORR, PFS, and OS.


Assuntos
Carcinoma , Neoplasias das Glândulas Salivares , Humanos , Estudos Prospectivos , Intervalo Livre de Doença , Cisplatino/uso terapêutico , Carboplatina/uso terapêutico , Carcinoma/tratamento farmacológico , Paclitaxel , Neoplasias das Glândulas Salivares/tratamento farmacológico , Glândulas Salivares , Protocolos de Quimioterapia Combinada Antineoplásica/uso terapêutico
3.
Biomed Phys Eng Express ; 8(6)2022 Nov 11.
Artigo em Inglês | MEDLINE | ID: mdl-36326618

RESUMO

Background and Purpose.The world health organization recommended to incorporate gene information such as isocitrate dehydrogenase 1 (IDH1) mutation status to improve prognosis, diagnosis, and treatment of the central nervous system tumors. We proposed our Shuffle Residual Network (Shuffle-ResNet) to predict IDH1 gene mutation status of the low grade glioma (LGG) tumors from multicenter anatomical magnetic resonance imaging (MRI) sequences including T2-w, T2-FLAIR, T1-w, and T1-Gd.Methods and Materials.We used 105 patient's dataset available in The Cancer Genome Atlas LGG project where we split them into training and testing datasets. We implemented a random image patch extractor to leverage tumor heterogeneity where about half a million image patches were extracted. RGB dataset were created from image concatenation. We used random channel-shuffle layer in the ResNet architecture to improve the generalization, and, also, a 3-fold cross validation to generalize the network's performance. The early stopping algorithm and learning rate scheduler were employed to automatically halt the training.Results.The early stopping algorithm terminated the training after 131, 106, and 96 epochs in fold 1, 2, and 3. The accuracy and area under the curve (AUC) of the validation dataset were 81.29% (95% CI (79.87, 82.72)) and 0.96 (95% CI (0.92, 0.98)) when we concatenated T2-FLAIR, T1-Gd, and T2-w to produce an RGB dataset. The accuracy and AUC values of the test dataset were 85.7% and 0.943.Conclusions.Our Shuffle-ResNet could predict IDH1 gene mutation status using multicenter MRI. However, its clinical application requires more investigation.


Assuntos
Neoplasias Encefálicas , Aprendizado Profundo , Glioma , Humanos , Isocitrato Desidrogenase/genética , Neoplasias Encefálicas/diagnóstico por imagem , Neoplasias Encefálicas/genética , Estudos Retrospectivos , Glioma/diagnóstico por imagem , Glioma/genética , Imageamento por Ressonância Magnética/métodos , Mutação , Progressão da Doença
4.
Brain Behav ; 12(9): e2733, 2022 09.
Artigo em Inglês | MEDLINE | ID: mdl-35976888

RESUMO

OBJECTIVE: The Covid-19 epidemic, which has become the most challenging issue for health organizations and governments, has led to panic among people, especially pregnant women. The aim of this study was to investigate the psychometric properties of the Persian version of the Fear of COVID-19 Scale (FCV-19S) on a sample of Iranian pregnant women. METHODS: This cross-sectional study was performed on 500 pregnant women referred to gynecology offices in Tehran. Construct validity was performed using exploratory (with maximum likelihood method and Promax rotation) and confirmatory factor analysis. Cronbach's alpha and McDonald omega coefficients were used to examine internal consistency. RESULTS: The mean age of the women was 28.98 (SD = 5.86) years. In exploratory factor analysis, two factors were extracted-emotional response and physiological response, which together explained 65.21% of the total variance of fear of Covid-19. In the confirmatory factor analysis, the final model had a good fit: CMIN/df = 1.515, goodness of fit index (GFI) = 0.981, adjusted goodness of fit index (AGFI) = 0.956, normed fit index (NFI) = 0.979, Incremental Fit Index (IFI) = 0.993, comparative fit index (CFI) = 0.993, and root mean square error of approximation (RMSEA) = 0.045 (95% CI: 0.001-0.085). Cronbach alpha and McDonald omega coefficients for the first factor were 0.874 and 0.878, and for the second factor were 0.853 and 0.854, respectively. CONCLUSION: The FCV-19S in pregnant women has a good construct validity and can be used in various studies.


Assuntos
COVID-19 , Gestantes , Adulto , Estudos Transversais , Medo , Feminino , Humanos , Irã (Geográfico) , Gravidez , Psicometria , Reprodutibilidade dos Testes , Inquéritos e Questionários
5.
Case Rep Oncol ; 15(3): 927-935, 2022.
Artigo em Inglês | MEDLINE | ID: mdl-36636676

RESUMO

As a rare entity, sarcomas of the head and neck are challenging cases. In this paper, we represent a unique case of Ewing sarcoma of mandible, serving as an example of multidisciplinary team importance in a developing country.

6.
Cancer Rep (Hoboken) ; 5(1): e1425, 2022 01.
Artigo em Inglês | MEDLINE | ID: mdl-34101389

RESUMO

BACKGROUND: The current first-line treatment of locally advanced head and neck carcinoma (LAHNC) is concurrent chemoradiation with three-weekly cisplatin 100 mg/m2 . However, prescribing cisplatin at this dose increases the treatment toxicity, which may compromise the treatment results. An alternative schedule is weekly 40 mg/m2 cisplatin. AIM: To compare the acute hematologic and renal toxicities of these two regimens. METHODS: This randomized clinical trial included 77 LAHNC patients who were allocated to a high dose (100 mg/m2 every 3 weeks) or low dose (40 mg/m2 weekly) cisplatin group concurrent with radiotherapy. Hematologic and renal indices were measured weekly during chemoradiation. RESULTS: The average age of patients was 55.3 years. Overall, 71.4% of patients were treated in a definitive setting. The incidence of severe hematologic events was not significantly different. However, the average estimated glomerular filtration rate (eGFR) was significantly greater in the three-weekly group (67.85 vs. 58.57% mL/min per 1.73 m2 ; P-value = .02). Cumulative cisplatin dose of ≥240 mg/m2 was significantly greater in the weekly group. Totally, treatment breaks occurred in 40.3% of patients due to treatment toxicity. Treatment interruption was primarily due to neutropenia in the three-weekly and renal dysfunction and thrombocytopenia in the weekly group. CONCLUSIONS: Severe acute hematologic toxicities were comparable for three-weekly and weekly groups. The decrease in eGFR through treatment was more significant with weekly cisplatin. Further follow-up, however, is needed to confirm its impact on delayed renal function.


Assuntos
Antineoplásicos/toxicidade , Cisplatino/toxicidade , Neoplasias de Cabeça e Pescoço/terapia , Carcinoma de Células Escamosas de Cabeça e Pescoço/terapia , Adulto , Idoso , Antineoplásicos/administração & dosagem , Quimiorradioterapia/efeitos adversos , Quimiorradioterapia/métodos , Cisplatino/administração & dosagem , Esquema de Medicação , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Estudos Prospectivos
7.
J Altern Complement Med ; 27(3): 255-262, 2021 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-33512251

RESUMO

Introduction: Oral mucositis (OM) is the most prevalent side effect in patients with head and neck cancer (HNC). It causes an obvious decrease in quality of life (QoL) in these patients, so different medications have been recommended for OM, however, without optimal response. This randomized trial aimed to assess the effects of a honey-lemon spray compared with benzydamine hydrochloride in prevention of radiation-induced OM in patients with HNC. Materials and Methods: Forty-six patients with HNC received external beam radiotherapy for 5 days per week. Patients were randomized to treatment with either benzydamine hydrochloride spray or honey-lemon spray for 5 weeks and continued for 1 week after the end of treatment. The oral cavity was examined weekly, with a score given to each site based on the degree of mucositis using a 4-point scale, and a mean mucositis score was calculated as the primary outcome. Occurrence of OM, pain, QoL, and adverse effects were defined as secondary outcomes. Patients, therapists, and outcome assessors were blinded to group allocation. Results: No significant group differences occurred in the mucositis score, pain, or QoL. Mucositis occurrence rates were higher in the benzydamine hydrochloride group compared with the honey-lemon group (hazard ratio = 2.1, 95% confidence interval: 1.1 to 4.2). Two patients in the honey-lemon group had mild nausea and burning throat; no adverse effects occurred in the benzydamine hydrochloride group. Conclusions: There were no significant group differences in mucositis severity between patients treated with honey-lemon spray and benzydamine hydrochloride. The potential preventive effects of honey-lemon spray need to be confirmed in further trials. The trial registration number is IRCT20161024030467N1.


Assuntos
Benzidamina/uso terapêutico , Produtos Biológicos/uso terapêutico , Neoplasias de Cabeça e Pescoço/radioterapia , Mel , Estomatite , Adulto , Aerossóis , Idoso , Anti-Inflamatórios/administração & dosagem , Anti-Inflamatórios/uso terapêutico , Benzidamina/administração & dosagem , Produtos Biológicos/administração & dosagem , Citrus , Método Duplo-Cego , Feminino , Humanos , Irã (Geográfico) , Masculino , Medicina Tradicional , Pessoa de Meia-Idade , Projetos Piloto , Lesões por Radiação/tratamento farmacológico , Lesões por Radiação/etiologia , Radioterapia/efeitos adversos , Estomatite/tratamento farmacológico , Estomatite/etiologia
8.
Int J Radiat Oncol Biol Phys ; 109(4): 859-866, 2021 03 15.
Artigo em Inglês | MEDLINE | ID: mdl-33278503

RESUMO

INTRODUCTION: Radiation therapy (RT), commonly used in cancer management, has been considered as one of the potential treatments for COVID-19 pneumonia. Here, we present the results of the pilot trial evaluating low-dose whole-lung irradiation (LD-WLI) in patients with COVID-19 pneumonia. METHODS: Ten patients with moderate COVID-19 pneumonia were treated with LD-WLI in a single fraction of 0.5 or 1.0 Gy along with the national protocol. The primary endpoint was an improvement in Spo2. The secondary endpoints were the number of days of hospital/intensive care unit stay, the number of intubations after RT, 28-day mortality, and changes in biomarkers. The response rate (RR) was defined as an increase in Spo2 upon RT with a rising or constant trend in the next 2 days, clinical recovery (CR) including patients who were discharged or acquired Spo2 ≥93% on room air, and 28-day mortality rate defined based on days of RT. RESULTS: The median age was 75 years (80% male). Five, 1, and 4 patients received single-dose 0.5 Gy, two-dose 0.5 Gy, and single-dose 1.0 Gy LD-WLI, respectively. The mean improvement in Spo2 at days 1 and 2 after RT was 2.4% (±4.8%) and 3.6% (±6.1%), respectively, with improvement in 9 patients after 1 day. Five, 1, and 4 patients were discharged, opted out of the trial, and died in the hospital, respectively. Two of 5 discharged patients died within 3 days at home. Among discharged patients, the Spo2 at discharge was 81% to 88% in 3 patients and 93% in the other 2 patients. Overall, the RR and CR were 63.6% and 55.5%, respectively. The RR, CR, and 28-day mortality of the single 0.5 Gy and 1.0 Gy WLI groups were 71.4% versus 50% (P = .57), 60% versus 50% (P = .64), and 50% versus 75% (P = .57), respectively. CONCLUSION: LD-WLI with a single fraction of 0.5 Gy or 1 Gy is feasible. A randomized trial with patients who do not receive radiation is required to assess the efficacy of LD-WLI for COVID-19.


Assuntos
COVID-19/radioterapia , Pulmão/efeitos da radiação , Doses de Radiação , Idoso , Idoso de 80 Anos ou mais , Feminino , Humanos , Pulmão/virologia , Masculino , Pessoa de Meia-Idade , Projetos Piloto , Dosagem Radioterapêutica , Resultado do Tratamento
9.
Rep Pract Oncol Radiother ; 25(6): 969-973, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-33100913

RESUMO

AIM AND BACKGROUND: Propolis has been used for the management of oral mucositis in a number of studies. Due to lack of sufficient evidence especially in radiotherapy induced oral mucositis, the present study was designed to evaluate the efficacy and safety of propolis mouthwash in oral mucositis and dysphagia in patients undergoing head and neck radiotherapy. MATERIALS AND METHODS: This study was a prospective, randomised, double-blind, placebo-controlled trial. The patients randomly divided into two groups receiving either the propolis or the placebo mouthwash. Patients were advised to rinse their mouth with 15 mL three times daily for four weeks. Severity of mucositis and dysphagia were evaluated by the National Cancer Institute Common Toxicity Criteria (NCI-CTC) and Common Terminology Criteria for Adverse Events (CTCAE), respectively. RESULTS: Thirty patients completed the study. Each group consisted of 15 patients. Although, there is not any significant difference between two groups in the first week of radiotherapy, a significant difference was seen in the second, the third and the fourth week (p = 0.03, 0.02, 0.02, respectively). Dysphagia reported as a mild score in the propolis group only in the fourth week which is significant compared with the placebo group (p = 0.01). There is not any serious adverse effect related to propolis or placebo during the study. CONCLUSION: It seems that propolis mouthwash is an effective and safe medication for alleviation of oral mucositis and dysphagia in patients under head and neck radiotherapy.

10.
J Altern Complement Med ; 26(9): 807-812, 2020 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-32924550

RESUMO

Objectives: Chemotherapy-induced peripheral neuropathy (CIPN) is a common adverse effect of various anticancer regimens with different sensory-motor abnormalities in patients. The aim of this study was to examine the feasibility of using Costus sp. oil as a palliative treatment in such patients. Design: This was a pilot randomized placebo-controlled double-blind clinical study. Settings/Location: Imam Hossein Hospital, Tehran, Iran. Subjects: Patients 18-80 years of age undergoing chemotherapy treatment recently or during the last 6 months were enrolled after meeting the inclusion criteria. Interventions: The intervention group used Costus sp. as a topical ointment and the placebo group used topical paraffin for 4 weeks. Outcome measures: Feasibility of recruitment, including treatment acceptability (evaluated as number of patients leaving the study early), and compliance (defined as consumption of a minimum 80% of the ointment) with the intervention were assessed. Neuropathic pain change was defined as the secondary outcome, too. Results: Totally, 50 out of 73 participants were identified eligible and were randomly divided into intervention or placebo groups. There was no significant difference between groups in terms of sociodemographic data. At the end of the study, 24% (confidence interval [95% CI]: 9-45) (intervention group) and 12% (95% CI: 2-31) (placebo group) of patients revealed treatment unacceptability. Meanwhile, 12% (95% CI: 2-31) in the intervention group and 28% (95% CI: 12-49) in the placebo group did not show the compliance. Moreover, according to patients' records, pain reduction was higher in the intervention group compared to the placebo group (p = 0.001). Conclusions: This preliminary study showed that topical use of Costus sp. was feasible and acceptable in patients suffering from CIPN.


Assuntos
Antineoplásicos/efeitos adversos , Costus , Neoplasias/tratamento farmacológico , Neuralgia/terapia , Cuidados Paliativos , Fitoterapia , Óleos de Plantas/uso terapêutico , Administração Tópica , Adulto , Idoso , Método Duplo-Cego , Estudos de Viabilidade , Feminino , Humanos , Irã (Geográfico) , Masculino , Pessoa de Meia-Idade , Neuralgia/etiologia , Pomadas , Pacientes Desistentes do Tratamento , Projetos Piloto
11.
Rep Pract Oncol Radiother ; 25(5): 738-745, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-32684863

RESUMO

AIM: The aim of this study is to construct and evaluate Pseudo-CT images (P-CTs) for electron density calculation to facilitate external radiotherapy treatment planning. BACKGROUND: Despite numerous benefits, computed tomography (CT) scan does not provide accurate information on soft tissue contrast, which often makes it difficult to precisely differentiate target tissues from the organs at risk and determine the tumor volume. Therefore, MRI imaging can reduce the variability of results when registering with a CT scan. MATERIALS AND METHODS: In this research, a fuzzy clustering algorithm was used to segment images into different tissues, also linear regression methods were used to design the regression model based on the feature extraction method and the brightness intensity values. The results of the proposed algorithm for dose-volume histogram (DVH), Isodose curves, and gamma analysis were investigated using the RayPlan treatment planning system, and VeriSoft software. Furthermore, various statistical indices such as Mean Absolute Error (MAE), Mean Error (ME), and Structural Similarity Index (SSIM) were calculated. RESULTS: The MAE of a range of 45-55 was found from the proposed methods. The relative difference error between the PTV region of the CT and the Pseudo-CT was 0.5, and the best gamma rate was 95.4% based on the polar coordinate feature and proposed polynomial regression model. CONCLUSION: The proposed method could support the generation of P-CT data for different parts of the brain region from a collection of MRI series with an acceptable average error rate by different evaluation criteria.

12.
Int J Radiat Oncol Biol Phys ; 108(5): 1134-1139, 2020 12 01.
Artigo em Inglês | MEDLINE | ID: mdl-32707264

RESUMO

PURPOSE: The COVID-19 outbreak is affecting people worldwide. Many infected patients have respiratory involvement that may progress to acute respiratory distress syndrome. This pilot study aimed to evaluate the clinical efficacy of low-dose whole-lung radiation therapy in patients with COVID-19 pneumonia. METHODS AND MATERIALS: In this clinical trial, conducted in Iran, we enrolled patients with COVID-19 who were older than 60 years and hospitalized to receive supplementary oxygen for their documented pneumonia. Participants were treated with whole-lung irradiation in a single fraction of 0.5 Gy plus the national protocol for the management of COVID-19. Vital signs (including blood oxygenation and body temperature) and laboratory findings (interleukin-6 and C-reactive peptide) were recorded before and after irradiation. RESULTS: Between May 21, 2020 and June 24, 2020, 5 patients received whole-lung irradiation. They were followed for 5 to 7 days to evaluate the response to treatment and toxicities. The clinical and paraclinical findings of 4 of the 5 patients (patient 4 worsened and died on day 3) improved on the first day of irradiation. Patient 3 opted out of the trial on the third day after irradiation. The mean time to discharge was 6 days for the other 3 patients. No acute radiation-induced toxicity was recorded. CONCLUSIONS: With a response rate of 80%, whole-lung irradiation in a single fraction of 0.5 Gy had encouraging results in oxygen-dependent patients with COVID-19 pneumonia.


Assuntos
COVID-19/radioterapia , SARS-CoV-2 , Idoso , Idoso de 80 Anos ou mais , Feminino , Humanos , Irã (Geográfico) , Pulmão/efeitos da radiação , Masculino , Pessoa de Meia-Idade , Projetos Piloto , Dosagem Radioterapêutica , Resultado do Tratamento
14.
J Adolesc Young Adult Oncol ; 8(3): 342-348, 2019 06.
Artigo em Inglês | MEDLINE | ID: mdl-30585751

RESUMO

Purpose: To evaluate awareness of female cancer patients about fertility impairment following cancer treatment. Patients and Methods: This cross-sectional study was conducted in Imam Hossein Hospital between March 2014 and July 2015. Women of childbearing age with cancer who were treated in an oncology clinic and referred for follow-up were asked to fill out the questionnaire designed for this purpose. The process of filling out the questionnaire was managed by a resident of clinical oncology during patient interviews. Results: Two hundred forty-seven patients with mean age of 35.5 years were included. The most common cancers were breast cancer (61.9%) and gynecologic cancer (10.9%). Among all patients, 22.7% had received information about infertility risk. The likelihood that women would have received information about fertility varied by cancer type. Among women with gynecologic cancers, only 59.3% had received information about the effects of treatment on fertility despite having cancers of the reproductive system. Moreover, 19.6% of women with breast cancer and 18.5% of those with other cancers had received fertility information (p < 0.001). Significance of Results: Knowledge and awareness of female cancer patients of childbearing age about the impact of cancer treatment on fertility and fertility preservation are limited. A structured program is required to provide complete information regarding the risk of fertility impairment following cancer treatment and increase the knowledge of these patients to enable them to make a proper decision about fertility preservation.


Assuntos
Neoplasias da Mama/complicações , Preservação da Fertilidade/métodos , Fertilidade/fisiologia , Infertilidade Feminina/psicologia , Adulto , Estudos Transversais , Feminino , Humanos , Pessoa de Meia-Idade , Adulto Jovem
15.
Cancer Imaging ; 18(1): 33, 2018 Sep 18.
Artigo em Inglês | MEDLINE | ID: mdl-30227891

RESUMO

PURPOSE: The aim of this study was to compare diffusion tensor imaging (DTI) isotropic map (p-map) with current radiographically (T2/T2-FLAIR) methods based on abnormal hyper-signal size and location of glioblastoma tumor using a semi-automatic approach. MATERIALS AND METHODS: Twenty-five patients with biopsy-proved diagnosis of glioblastoma participated in this study. T2, T2-FLAIR images and diffusion tensor imaging (DTI) were acquired 1 week before radiotherapy. Hyper-signal regions on T2, T2-FLAIR and DTI p-map were segmented by means of semi-automated segmentation. Manual segmentation was used as ground truth. Dice Scores (DS) were calculated for validation of semiautomatic method. Discordance Index (DI) and area difference percentage between the three above regions from the three modalities were calculated for each patient. RESULTS: Area of abnormality in the p-map was smaller than the corresponding areas in the T2 and T2-FLAIR images in 17 patients; with mean difference percentage of 30 ± 0.15 and 35 ± 0.15, respectively. Abnormal region in the p-map was larger than the corresponding areas in the T2-FLAIR and T2 images in 4 patients; with mean difference percentage of 26 ± 0.17 and 29 ± 0.28, respectively. This region in the p-map was larger than the one in the T2 image and smaller than the one in the T2-FLAIR image in 3 patients; with mean difference percentage of 34 ± 0.08 and 27 ± 0.06, respectively. Lack of concordance was observed ranged from 0.214-0.772 for T2-FLAIR/p-map (average: 0.462 ± 0.18), 0.266-0.794 for T2 /p-map (average: 0.468 ± 0.13) and 0.123-0.776 for T2/ T2-FLAIR (average: 0.423 ± 0.2). These regions on three modalities were segmented using a semi-automatic segmentation method with over 86% sensitivity, 90% specificity and 89% dice score for three modalities. CONCLUSION: It is noted that T2, T2-FLAIR and DTI p-maps represent different but complementary information for delineation of glioblastoma tumor margins. Therefore, this study suggests DTI p-map modality as a candidate to improve target volume delineation based on conventional modalities, which needs further investigations with follow-up data to be confirmed.


Assuntos
Mapeamento Encefálico/métodos , Neoplasias Encefálicas/diagnóstico por imagem , Imagem de Tensor de Difusão/métodos , Glioblastoma/diagnóstico por imagem , Imageamento por Ressonância Magnética/métodos , Adulto , Idoso , Encéfalo/diagnóstico por imagem , Encéfalo/patologia , Neoplasias Encefálicas/patologia , Feminino , Glioblastoma/patologia , Humanos , Masculino , Pessoa de Meia-Idade , Sensibilidade e Especificidade
16.
Radiol Med ; 123(1): 36-43, 2018 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-28914416

RESUMO

PURPOSE: To evaluate whether the pretreatment apparent diffusion coefficient (ADC) heterogeneity parameters and their alterations, after one cycle of induction chemotherapy, can be used as reliable markers of treatment response to induction chemotherapy in patients with nasopharyngeal cancer. MATERIALS AND METHODS: Ten patients were recruited and received induction chemotherapy (IC). Diffusion-weighted imaging was performed prior to, during, and after IC. The first-order ADC histogram parameters at the intra-treatment time-point were compared to the baseline time-point in the metastatic lymph nodes (LNs). Some ADC pretreatment parameters were combined with each other, employing discriminant analysis to achieve a feasible model to separate the complete response (CR) from the partial response (PR) groups. RESULTS: For ten patients, significant rise in Mean and Txt1Mean (p = 0.048 and 0.015, respectively) was observed in the metastatic nodes following one cycle of IC. Txt5Energy significantly decreased (p = 0.002). Discriminant analysis on pretreatment parameters illustrated that Txt5Energypre was the best parameter to use to correctly classify CR and PR patients. This was followed by Txt9Percentile75pre, Txt1Meanpre, and Txt2Standard Deviationpre. CONCLUSIONS: Our results suggest that heterogeneity metrics extracted from ADC-maps in metastatic lymph nodes, before and after IC, can be used as supplementary IC response indicators.


Assuntos
Carcinoma/diagnóstico por imagem , Carcinoma/tratamento farmacológico , Imagem de Difusão por Ressonância Magnética , Quimioterapia de Indução , Neoplasias Nasofaríngeas/diagnóstico por imagem , Neoplasias Nasofaríngeas/tratamento farmacológico , Adulto , Carcinoma/patologia , Feminino , Humanos , Metástase Linfática , Masculino , Pessoa de Meia-Idade , Carcinoma Nasofaríngeo , Neoplasias Nasofaríngeas/patologia , Valor Preditivo dos Testes , Resultado do Tratamento
17.
J Cancer Res Ther ; 13(1): 69-79, 2017.
Artigo em Inglês | MEDLINE | ID: mdl-28508836

RESUMO

CONTEXT: Using this source model, the Monte Carlo (MC) computation becomes much faster for electron beams. AIMS: The aim of this study was to present a source model that makes linear accelerator (LINAC) electron beam geometry simulation less complex. SETTINGS AND DESIGN: In this study, a tabulated square-shaped source with transversal and axial distribution biasing and semi-Gaussian spectrum was investigated. SUBJECTS AND METHODS: A low energy photon spectrum was added to the semi-Gaussian beam to correct the bremsstrahlung X-ray contamination. After running the MC code multiple times and optimizing all spectrums for four electron energies in three different medical LINACs (Elekta, Siemens, and Varian), the characteristics of a beam passing through a 10 cm × 10 cm applicator were obtained. The percentage depth dose and dose profiles at two different depths were measured and simulated. RESULTS: The maximum difference between simulated and measured percentage of depth doses and dose profiles was 1.8% and 4%, respectively. The low energy electron and photon spectrum and the Gaussian spectrum peak energy and associated full width at half of maximum and transversal distribution weightings were obtained for each electron beam. The proposed method yielded a maximum computation time 702 times faster than a complete head simulation. CONCLUSIONS: Our study demonstrates that there was an excellent agreement between the results of our proposed model and measured data; furthermore, an optimum calculation speed was achieved because there was no need to define geometry and materials in the LINAC head.


Assuntos
Neoplasias/radioterapia , Aceleradores de Partículas/estatística & dados numéricos , Radiometria , Planejamento da Radioterapia Assistida por Computador , Simulação por Computador , Elétrons , Humanos , Modelos Estatísticos , Método de Monte Carlo , Fótons/uso terapêutico , Dosagem Radioterapêutica
18.
J Integr Med ; 15(3): 201-208, 2017 05.
Artigo em Inglês | MEDLINE | ID: mdl-28494850

RESUMO

BACKGROUND: Xerostomia is one of the most common side effects of radiation therapy among patients with head and neck cancers (HNC). However, conventional medicine lacks an effective treatment for radiation-induced xerostomia. OBJECTIVE: Synthesizing the traditional use of Alcea digitata and Malva sylvestris with their known beneficial effects from recent studies, we evaluated the efficacy of the herbs in the quality of life (QOL) of HNC patients with radiation-induced xerostomia. DESIGN, SETTING, PARTICIPANTS AND INTERVENTIONS: This study is a randomized, double-arm, open-label active-controlled clinical trial. We evaluated the effect of A. digitata and M. sylvestris on QOL of HNC patients with radiation-induced xerostomia compared with Hypozalix (artificial saliva). Patients were enrolled from the Imam Hossein Hospital's oncology clinic in Shahid Beheshti University of Medical Sciences, Tehran, Iran. MAIN OUTCOME MEASURES: Primary outcome measures in this trial were changes in patients' QOL assessed by the European Organization for Research and Treatment of Cancer Quality of Life Questionnaire, Head and Neck Module (EORTC QLQ-H&N 35). RESULTS: Between-group analysis showed that the intervention group patients obtained significantly lower (better) total EORTC QLQ-H&N 35 scores as compared to the control group at the end of the intervention period (P = 0.007). Mean scores of dry mouth of EORTC QLQ-H&N 35 was also significantly lower (better) in the intervention group as compared to the control group (P = 0.017). CONCLUSION: Traditional Persian medicine preparation of hollyhocks and common mallow should be considered as a suitable treatment for xerostomia and improving QOL in HNC patients with radiation-induced xerostomia. TRIAL REGISTRATION: The trial was registered in ClinicalTrials.gov with Identifier: NCT02854358.


Assuntos
Neoplasias de Cabeça e Pescoço/radioterapia , Malvaceae , Medicina Tradicional , Fitoterapia , Qualidade de Vida , Lesões por Radiação/tratamento farmacológico , Xerostomia/tratamento farmacológico , Adulto , Feminino , Humanos , Masculino , Malva , Pessoa de Meia-Idade , Boca , Pérsia , Extratos Vegetais/uso terapêutico , Xerostomia/etiologia
19.
J Curr Ophthalmol ; 29(1): 50-53, 2017 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-28367527

RESUMO

PURPOSE: To evaluate the efficacy of botulinum toxin injection in the patients with type 1 Duane syndrome and identify the predictive factors for success. METHODS: Sixteen patients with esotropic type 1 Duane syndrome without history of ocular surgery were selected for this interventional case series. The botulinum toxin was injected in the medial rectus of all patients. Visual acuity, dry refraction, cyclo-refraction, ocular motility, and amount of deviation were measured. Complete success, partial success, and failure were defined as residual deviation/face turn less than 8 prism diopters (PD)/5°, 8-20 PD/5-15°, and equal or greater than 20 PD/15°, respectively. RESULTS: Sixteen cases (6 males) were included in our study. The mean esotropia was 26.27 ± 8.35 (12-40 PD) which was reduced significantly to 13.5 ± 12.39 PD during 6 months follow-up (p < 0.001). Face turn was improved significantly from a preoperative mean of 18.27° to: 0.094° at 1 week, 0.11° at 1 month, 3.31° at 3 months, and 7° at 6 months (p < 0.001). Complete success was seen in 6 patients (37.5%), partial success in 4 patients (25%), and failure in 6 patients (37.5%). There was a significant relation between the amount of forced duction testing (FDT) and the success rate (p: 0.019). No complication was seen during injections. CONCLUSIONS: Botulinum toxin could be an alternative treatment in Duane syndrome with appropriate case selection. FDT could be a predictive factor for response to botulinum toxin.

20.
Asian Pac J Cancer Prev ; 17(S3): 87-91, 2016.
Artigo em Inglês | MEDLINE | ID: mdl-27165214

RESUMO

To investigate whether excision repair cross complementing-group1 (ERCC1) expression status could serve as a bio-predictor of response to platinum-based induction chemotherapy for head and neck cancers (HNCs) patients with a diagnosis of epithelial HNC were studied retrospectively. Paraffin embedded tumor samples of the patients were analyzed by reverse transcription-polymerase chain reaction (RT-PCR) to determine ERCC1 expression status and its correlation with response to platinum-based induction chemotherapy was investigated. Of 44 included patients, 33 were male (75%) and 11 were female (25%) with a mean age of 53 years. Some 36% of patients whose tumor samples had high ERCC1 expression showed no response to induction chemotherapy. The value for patients with low ERCC1 expression was 9% and the difference was statistically significant (p=0.03). The ERCC1 expression state did not significantly vary between patient groups according to sex, age, primary tumor site, and tumor and node stage. Our study indicates that ERCC1 expression status detected by RT-PCR might serve as a bio-predictor of response to platinum-based induction chemotherapy for epithelial HNCs.


Assuntos
Protocolos de Quimioterapia Combinada Antineoplásica/uso terapêutico , Biomarcadores Tumorais/genética , Proteínas de Ligação a DNA/genética , Endonucleases/genética , Neoplasias de Cabeça e Pescoço/genética , Neoplasias de Cabeça e Pescoço/patologia , Adulto , Idoso , Carboplatina/administração & dosagem , Cisplatino/administração & dosagem , Docetaxel , Feminino , Fluoruracila/administração & dosagem , Seguimentos , Neoplasias de Cabeça e Pescoço/tratamento farmacológico , Humanos , Quimioterapia de Indução , Masculino , Pessoa de Meia-Idade , Invasividade Neoplásica , Estadiamento de Neoplasias , Paclitaxel/administração & dosagem , Prognóstico , RNA Mensageiro/genética , Reação em Cadeia da Polimerase em Tempo Real , Estudos Retrospectivos , Reação em Cadeia da Polimerase Via Transcriptase Reversa , Taxa de Sobrevida , Taxoides/administração & dosagem
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