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1.
Cancer ; 130(14): 2528-2537, 2024 Jul 15.
Artigo em Inglês | MEDLINE | ID: mdl-38373062

RESUMO

INTRODUCTION: This study aims to quantitatively assess eligible patients and project the demand for particle therapy facilities in India from 2020 to 2040. In addition, an economic analysis evaluates the financial feasibility of implementing this technology. The study also examines the prospective benefits and challenges of adopting this technology in India. METHODOLOGY: Cancer incidence and projected trends were analyzed for pediatric patients using the Global Childhood Cancer microsimulation model and adult patients using the Globocan data. Economic cost evaluation is performed for large-scale combined particle (carbon and proton-three room fixed-beam), large-scale proton (one gantry and two fixed-beam), and small-scale proton (one gantry) facility. RESULTS: By 2040, the estimated number of eligible patients for particle therapy is projected to reach 161,000, including approximately 14,000 pediatric cases. The demand for particle therapy facilities is projected to rise from 81 to 97 in 2020 to 121 to 146 by 2040. The capital expenditure is estimated to be only 3.7 times that of a standard photon linear accelerator over a 30-year period. Notably, the treatment cost can be reduced to USD 400 to 800 per fraction, substantially lower than that in high-income countries (USD 1000 to 3000 per fraction). CONCLUSION: This study indicates that, in the Indian scenario, all particle therapy models are cost-beneficial and feasible, with large-scale proton therapy being the most suitable. Despite challenges such as limited resources, space, a skilled workforce, referral systems, and patient affordability, it offers substantial benefits. These include the potential to treat many patients and convenient construction and operational costs. An iterative phased implementation strategy can effectively overcome these challenges, paving the way for the successful adoption of particle therapy in India. PLAIN LANGUAGE SUMMARY: In India, the number of eligible patients benefiting from high-precision particle therapy technology is projected to rise till 2040. Despite high upfront costs, our study finds the long-term feasibility of all particle therapy models, potentially offering a substantial reduction in treatment cost compared to high-income countries. Despite challenges, India can succeed with an iterative phased approach.


Assuntos
Neoplasias , Humanos , Índia/epidemiologia , Neoplasias/terapia , Neoplasias/economia , Neoplasias/radioterapia , Neoplasias/epidemiologia , Criança , Terapia com Prótons/economia , Adulto , Necessidades e Demandas de Serviços de Saúde/economia , Análise Custo-Benefício
2.
Pediatr Blood Cancer ; 70(3): e30135, 2023 03.
Artigo em Inglês | MEDLINE | ID: mdl-36524611

RESUMO

BACKGROUND: Diagnostic delays in cancers are frequent in developing countries due to poor health infrastructure. Existing literature from developed countries suggests that diagnostic interval in bone sarcomas is primarily dictated by tumour biology with no impact on survival. This study evaluates the social and biological determinants of the diagnostic interval in bone sarcomas in a resource-challenged setting and assesses its impact on treatment outcomes. METHODS: A retrospective single-institutional study was conducted on patients with high-grade bone sarcomas recorded in the sarcoma clinic database between 2003 and 2018. Baseline clinical characteristics and treatment outcomes were recorded. Logistic regression was performed to assess the impact of baseline clinical and social characteristics (distance from treating centre and rural vs. urban residence) on the diagnostic interval. Further, the impact of diagnostic interval on histologic response to neoadjuvant chemotherapy, amputation requirement in extremity sarcomas and survival was evaluated. RESULTS: A total of 1227 patients were included for analysis. The median diagnostic interval was 4 months (3-7 months). Age above 18 years, Ewing sarcoma (ES) diagnosis, absence of fever at presentation and tumour size above 7.5 cm were predictors of a longer diagnostic interval (>4 months). The length of the diagnostic interval did not impact amputation requirement or survival outcomes. However, the proportion of patients with good necrosis post-neoadjuvant chemotherapy was lower among patients with longer diagnostic intervals (25% vs. 34·16%; p-value = .04). CONCLUSION: Tumour characteristics rather than social factors determined the diagnostic interval. Diagnostic interval did not impact survival outcomes even in a resource-constrained setting.


Assuntos
Neoplasias Ósseas , Osteossarcoma , Sarcoma de Ewing , Sarcoma , Humanos , Adolescente , Estudos Retrospectivos , Neoplasias Ósseas/diagnóstico , Neoplasias Ósseas/terapia , Sarcoma de Ewing/diagnóstico , Sarcoma de Ewing/terapia , Sarcoma/patologia
3.
Int Orthop ; 47(5): 1361-1372, 2023 05.
Artigo em Inglês | MEDLINE | ID: mdl-36847800

RESUMO

PURPOSE: Re-implantation of the tumor bearing autograft following extracorporeal radiation therapy (ECRT) has been established as an oncologically safe biological reconstruction technique following resection of bone sarcomas. However, factors affecting the ECRT graft-host bone incorporation have not been fully investigated. An insight into the factors that influence graft incorporation can circumvent the complications and increase graft survival. METHODS: A total of 96 osteotomies in 48 patients with intercalary resections of primary extremity bone sarcomas (mean age 15.8 years, mean follow-up 42.1 months) were analyzed retrospectively for factors ECRT autograft-host bone union. RESULTS: On univariate analysis, age < 20 years, metaphyseal osteotomy site, V-shaped diaphyseal osteotomy, and use of additional plate at diaphyseal osteotomy had a significantly faster time to union, while gender, tumour type, bone involved, resection length, chemotherapy, type of fixation, and use of intra-medullary fibula did not influence union time. In multivariate analysis, V-shaped diaphyseal osteotomy and use of additional plate at diaphyseal ostetomy were the independent factors with favourable time to union. None of the analyzed factors was found to have a significant effect on the union rate. The major complications were non-union in 11.4% patients, graft failure in 2.1%, infection in 12.5%, and soft tissue local recurrences in 14.5% patients. CONCLUSION: Modified diaphyseal osteotomy and augmentation of the stability of the reconstruction using additional small plates enhance the incorporation of ECRT autograft.


Assuntos
Neoplasias Ósseas , Osteossarcoma , Humanos , Adolescente , Adulto Jovem , Adulto , Estudos Retrospectivos , Autoenxertos , Centros de Atenção Terciária , Resultado do Tratamento , Transplante Ósseo/efeitos adversos , Transplante Ósseo/métodos , Neoplasias Ósseas/radioterapia , Neoplasias Ósseas/cirurgia , Neoplasias Ósseas/patologia , Osteossarcoma/radioterapia , Osteossarcoma/cirurgia , Fíbula/transplante
4.
Breast J ; 23(6): 731-735, 2017 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-27886418

RESUMO

Breast and cervical cancer are the two most common cancers in female. However, owing to the contrasting risk factors, synchronous breast and cervical cancer has very rarely been reported. However, noncommunicable disease like cardiovascular disease and different infections has tended to make situations complicated because of complex interaction. In recent years, such cases are being seen frequently and their management is challenging. We report such a case of synchronous breast and cervical cancer complicated by HIV infection and myocardial infarction. This highlights the importance of a wide spectrum of clinical knowledge and skill and interdisciplinary coordination.


Assuntos
Neoplasias da Mama/diagnóstico , Infecções por HIV , Infarto do Miocárdio/diagnóstico , Neoplasias do Colo do Útero/diagnóstico , Neoplasias da Mama/complicações , Neoplasias da Mama/tratamento farmacológico , Neoplasias da Mama/cirurgia , Diagnóstico Diferencial , Feminino , Humanos , Pessoa de Meia-Idade , Infarto do Miocárdio/complicações , Infarto do Miocárdio/tratamento farmacológico , Neoplasias do Colo do Útero/complicações , Neoplasias do Colo do Útero/tratamento farmacológico , Neoplasias do Colo do Útero/cirurgia
5.
J Obstet Gynaecol Res ; 43(1): 238-242, 2017 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-27928856

RESUMO

The simultaneous occurrence of carcinoma of the cervix and pelvic kidney is rare. As the pelvic kidney occupies the conventional radiation portal for carcinoma of the cervix, treatment of these patients with radiation presents a therapeutic challenge. A 48-year-old stage IIIB cervical carcinoma patient with an incidental diagnosis of pelvic kidney was treated with radical chemoradiotherapy using intensity-modulated radiotherapy with concurrent weekly cisplatin, followed by intracavitary radiotherapy. The bilateral kidney dose was restricted within a tolerance limit of 16.6 Gy. At the 18-month follow-up, the patient was disease free and had no deterioration in kidney function. Intensity-modulated radiotherapy provided the necessary means for delivering radical radiation doses in this case scenario with adequate sparing of the kidney.


Assuntos
Nefropatias/complicações , Nefropatias/radioterapia , Rim/anormalidades , Radioterapia de Intensidade Modulada/métodos , Neoplasias do Colo do Útero/complicações , Neoplasias do Colo do Útero/radioterapia , Quimiorradioterapia/métodos , Meios de Contraste , Fracionamento da Dose de Radiação , Feminino , Humanos , Rim/diagnóstico por imagem , Nefropatias/diagnóstico por imagem , Pessoa de Meia-Idade , Estadiamento de Neoplasias , Pós-Menopausa , Tomografia Computadorizada por Raios X , Resultado do Tratamento , Neoplasias do Colo do Útero/diagnóstico por imagem , Neoplasias do Colo do Útero/patologia
7.
World J Surg ; 40(8): 2036-42, 2016 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-27220508

RESUMO

BACKGROUND: This study was designed to evaluate the role of a single 18-FDG positron emission tomography and computed tomography (PET-CT) scan in comparison to multiple organ-directed conventional investigations (CI) as a staging tool in locally advanced breast cancer (LABC) to detect regional and distant metastasis. METHODS: All eligible patients were subjected to CI (chest X-ray, abdominal sonography, and bone scintigraphy) followed by a single 18-FDG PET-CT scan. Standard imaging criteria were used for diagnosis of metastasis. Histopathological confirmation was undertaken for suspicious lesions. An exploratory analysis was done to assess the impact of PET-CT on the staging of LABC and how it resulted in a change in management. RESULT: The study included 79 patients of LABC. PET-CT detected distant metastasis in 36 (45.5 %) patients while CI could identify distant metastasis in 20 (25.3 %) patients. Two of the 36 patients in whom PET-CT detected distant metastasis were false positive. Overall PET-CT upstaged the disease in 38 (48.1 %) patients as compared to CI: stage III to stage IV migration in 14 (17.7 %) patients due to identification of additional sites of distant metastasis, and within stage III upstaging in 24 (30.3 %) patients due to identification of additional regional lymphadenopathy. PET-CT led to a change in management plan in 14 (17.7 %) patients. CONCLUSION: PET-CT has a role in identifying additional sites of regional lymphadenopathy and distant metastasis to upstage the disease in a significant number of LABC patients in comparison to CI; this would help in accurate staging, selecting optimal treatment, and better prognostication of disease.


Assuntos
Neoplasias da Mama/patologia , Linfonodos/diagnóstico por imagem , Metástase Linfática/diagnóstico por imagem , Estadiamento de Neoplasias/métodos , Tomografia por Emissão de Pósitrons combinada à Tomografia Computadorizada , Adulto , Feminino , Fluordesoxiglucose F18 , Humanos , Pessoa de Meia-Idade , Estudos Prospectivos , Compostos Radiofarmacêuticos
8.
Childs Nerv Syst ; 31(12): 2341-4, 2015 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-26438548

RESUMO

PURPOSE: Primary pediatric gliosarcoma (pPGS) is an extremely rare entity with only 25 cases reported in the English literature. The value of concurrent and adjuvant temozolomide is not known in this group of patient. METHODS: Five patients of pPGS treated from 2006 to 2011 were included in this retrospective analysis. All patients underwent maximal safe surgical resection. Adjuvant therapy included conformal radiation 60 Gy in 30 fractions (2 Gy daily for 5 days in a week) with concurrent temozolomide 75 mg/m(2) daily followed by six cycles of maintenance temozolomide 150-200 mg/m(2) (day 1 to day 5) every 4 weeks. We combined the survival data of 25 patients (already published) and five of our patients and analyzed them in terms of progression free survival (PFS) and overall survival (OS) using Kaplan-Meier method. RESULTS: Male to female ratio was 1:4 and median age was 12 years (range, 7-19 years). All but one patient underwent gross total resection and four patients completed adjuvant radiotherapy as well as concurrent and adjuvant temozolomide. At a median follow up of 22.6 months (range, 0 to 45.3 months), two patients were dead and two were alive without disease while one was lost to follow up. For the pooled data, estimated median PFS and OS of all 30 patients reported in literature were 12 and 43 months, respectively. Two years PFS and OS rate for all patients was 44.2 and 62.9%, respectively. CONCLUSION: Adjuvant radiotherapy and temozolomide is well tolerated and show an encouraging survival in pPGS.


Assuntos
Antineoplásicos Alquilantes/uso terapêutico , Neoplasias Encefálicas/tratamento farmacológico , Neoplasias Encefálicas/radioterapia , Dacarbazina/análogos & derivados , Gliossarcoma/tratamento farmacológico , Gliossarcoma/radioterapia , Adolescente , Criança , Terapia Combinada , Dacarbazina/uso terapêutico , Feminino , Seguimentos , Humanos , Masculino , Estudos Retrospectivos , Análise de Sobrevida , Taxa de Sobrevida , Temozolomida , Adulto Jovem
9.
Int J Gynecol Cancer ; 24(2): 312-20, 2014 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-24407578

RESUMO

PURPOSE: This study aimed to assess the role of (18)F-fluorodeoxyglucose positron emission tomography-computed tomography ((18)F-FDG PET-CT) in response assessment of patients with recurrent carcinoma cervix and in evaluating the predictive value of metabolic response for progression-free survival (PFS) and overall survival (OS). METHODS: Thirty-six patients with histopathologically or clinically evident recurrent cervical carcinoma underwent a pretherapy and a posttherapy (18)F-FDG PET-CT for treatment response evaluation. Positron emission tomography-CT images were analyzed by 2 experienced nuclear medicine physicians. Response was categorized using European Organization for Research and Treatment of Cancer (EORTC) criteria into complete metabolic response (CMR), partial metabolic response (PMR), stable metabolic disease (SMD), and progressive metabolic disease (PMD). Clinical/imaging follow-up (minimum of 6 months) and/or histopathologic findings were taken as reference standard. Patients were categorized into 2 groups, those with PMD and those without PMD (ie, CMR, PMR, and SMD). Progression-free survival and OS based on PET-CT response were measured from the date of posttherapy PET-CT to the first documentation of progression of disease and death, respectively. RESULTS: On the basis of metabolic response on posttherapy PET-CT, 6 patients had CMR, 12 patients had PMR, 7 patients had SMD, and 11 patients had PMD. Progression-free survival for patients with cervical carcinoma ranged from 0.5 to 26.5 months (mean [SD], 6.7 [6.1] months). Median PFS for patients with PMD was 3.1 months, whereas median PFS for those without PMD was not reached. Patients who did not show PMD on posttherapy PET-CT had a significantly better PFS than those patients who showed PMD (P < 0.0001; HR, 0.14). There was no statistically significant difference in OS between the 2 groups (P = 0.187; HR, 0.39). CONCLUSIONS: (18)F-fluorodeoxyglucose PET-CT is an effective tool for treatment response evaluation in recurrent carcinoma cervix. Patients with metabolically progressive disease on posttherapy (18)F-FDG PET-CT have a significantly shorter PFS.


Assuntos
Carcinoma/diagnóstico por imagem , Fluordesoxiglucose F18 , Recidiva Local de Neoplasia/diagnóstico por imagem , Compostos Radiofarmacêuticos , Neoplasias do Colo do Útero/diagnóstico por imagem , Adulto , Idoso , Carcinoma/mortalidade , Carcinoma/terapia , Feminino , Humanos , Índia/epidemiologia , Pessoa de Meia-Idade , Recidiva Local de Neoplasia/mortalidade , Recidiva Local de Neoplasia/terapia , Tomografia por Emissão de Pósitrons , Estudos Prospectivos , Sobrevida , Neoplasias do Colo do Útero/mortalidade , Neoplasias do Colo do Útero/terapia
10.
J Cancer Res Ther ; 20(3): 943-948, 2024 Apr 01.
Artigo em Inglês | MEDLINE | ID: mdl-39023602

RESUMO

PURPOSE: Low-dose radiation therapy (LDRT) to lungs did show encouraging results in COVID-19 patients in some clinical trials. However, there has been some concern regarding the long-term risk of radiation-induced cancer (RIC). Compared to the conventional AP-PA field technique, volumetric modulated arc therapy (VMAT) can potentially reduce the dose to the marrow and other organs at risk (OARs) and thus minimize the risk of cancer. We designed a dosimetry study to study if VMAT can reduce the exposure to the marrow and other OAR doses and curtail the estimated life-time attributable risk (LAR) of cancer. METHODS AND MATERIALS: We retrieved the computed tomography scan data of 10 patients (aged 40-60 years, median 48 years) who have been already treated for any malignancy in the region of the thorax. A dose of 1.0 Gy in single fraction was prescribed to both lungs. All the organs were delineated as per the established guidelines. The dosimetry achieved by the two plans was compared to find the difference. Mean OAR doses were used to estimate the LAR for both plans and compared. RESULTS: Planning target volume coverage parameters like conformity index and homogeneity index were significantly better with VMAT (P value < 0.05 for all). The mean dose to most OARs was significantly lower with VMAT (P value < 0.05 for all). The mean dose to the marrow was significantly lower with VMAT (59.05 vs 81.9 cGy with P value < 0.05). The overall LAR was significantly lower with VMAT as compared to the conventional plan (0.357% vs 0.398%, P value < 0.05). CONCLUSION: Compared to the conventional technique, VMAT provides better OAR dosimetry for lung irradiation (a prescription dose of 1.0 Gy or more) in COVID-19 pneumonia. VMAT significantly reduces the risk of RIC. We therefore suggest if lung LDRT is used for COVID-19 patients, VMAT is the preferred technique for a prescription dose of ≥1.0 Gy.


Assuntos
Medula Óssea , COVID-19 , Órgãos em Risco , Dosagem Radioterapêutica , Planejamento da Radioterapia Assistida por Computador , Radioterapia de Intensidade Modulada , SARS-CoV-2 , Humanos , COVID-19/prevenção & controle , Radioterapia de Intensidade Modulada/métodos , Radioterapia de Intensidade Modulada/efeitos adversos , Pessoa de Meia-Idade , Masculino , Órgãos em Risco/efeitos da radiação , Adulto , Planejamento da Radioterapia Assistida por Computador/métodos , Medula Óssea/efeitos da radiação , Feminino , Pulmão/efeitos da radiação , Pulmão/diagnóstico por imagem , Radiometria/métodos , Tomografia Computadorizada por Raios X/métodos , Neoplasias Induzidas por Radiação/etiologia , Neoplasias Induzidas por Radiação/prevenção & controle
11.
J Cancer Res Ther ; 20(1): 1-8, 2024 Jan 01.
Artigo em Inglês | MEDLINE | ID: mdl-38554291

RESUMO

Thyroid carcinoma is the most common malignancy of the endocrine system and accounts for nearly 1.5% of all new cancer cases in India. The incidence of thyroid cancers is on the rise secondary to multiple factors including the widespread use of radiological imaging. Surgery remains the cornerstone of treatment, and radioactive iodine therapy plays a pivotal role in differentiated thyroid cancer. Radiation therapy appears to be an underutilized treatment modality. In this review, we have summarized the role of radiation in the treatment of thyroid cancer.


Assuntos
Adenocarcinoma , Neoplasias da Glândula Tireoide , Humanos , Adenocarcinoma/radioterapia , Radioisótopos do Iodo , Neoplasias da Glândula Tireoide/radioterapia , Neoplasias da Glândula Tireoide/patologia
12.
J Cancer Res Ther ; 20(3): 930-934, 2024 Apr 01.
Artigo em Inglês | MEDLINE | ID: mdl-39023600

RESUMO

INTRODUCTION: Surface mold brachytherapy (SMBT) is an established treatment modality in skin cancer, especially in accessible areas, and has shown comparable outcomes to surgery. We have presented our results for the skin tumor treatment with SMBT treated with high-dose-rate (HDR) brachytherapy in terms of clinical outcomes and toxicity at our institute. MATERIALS AND METHODS: In this retrospective analysis, 15 patients with skin cancer were treated with customized tube-based SMBT at our institute between January 2019 and July 2021. The patients were treated using HDR-brachytherapy using Iridium-192. The median dose was 40 Gy in 10 fractions. The dosimetric parameters were assessed, and patients were followed up as per the institutional protocol. All patients underwent individualized CT-based planning. Skin toxicity was assessed using the Dermatology Life Quality Index (DLQI). RESULTS: With the majority of the patients being male, the median age was 59 years and the most common site affected was the face (8/15; 53.3%). Among the 15 cases, five were squamous cell carcinoma, nine were basal cell carcinoma, and a single case of sebaceous cell carcinoma. The median depth of invasion was 4 mm, and the median catheter-to-surface distance was 1 mm. The complete response rate among the 10 definitive cases was 90% and partial response in one case. The treatment was well-tolerated with no grade 3-5 toxicities. The median V95% and V90% were 94.8% and 97.1%, respectively. The mean coverage index (C.I.), dose non-uniformity ratio (DNR), and overdose volume index (ODI) were 0.97, 0.13, and 0.05, respectively. After a median follow-up of 12 months, none of the patients had recurrence. On assessment of DLQI, the scores were found to be significant in association with the tumor size and tumor site with scores favoring <2 cm and non-exposed area lesions. CONCLUSION: SMBT is a safe and effective treatment modality for skin tumors providing excellent response and cosmetic outcomes. It is well-tolerated and a non-invasive option for elderly patients with comorbidities and lesions in inoperable areas.


Assuntos
Braquiterapia , Dosagem Radioterapêutica , Neoplasias Cutâneas , Humanos , Braquiterapia/efeitos adversos , Braquiterapia/métodos , Masculino , Pessoa de Meia-Idade , Neoplasias Cutâneas/radioterapia , Neoplasias Cutâneas/patologia , Feminino , Estudos Retrospectivos , Idoso , Adulto , Radioisótopos de Irídio/uso terapêutico , Resultado do Tratamento , Planejamento da Radioterapia Assistida por Computador/métodos , Carcinoma Basocelular/radioterapia , Carcinoma Basocelular/patologia , Seguimentos , Carcinoma de Células Escamosas/radioterapia , Carcinoma de Células Escamosas/patologia , Qualidade de Vida
13.
Int J Gynecol Cancer ; 23(4): 705-9, 2013 May.
Artigo em Inglês | MEDLINE | ID: mdl-23466569

RESUMO

OBJECTIVES: There are limited options for patients with recurrent or metastatic cervical carcinoma who are either refractory to or ineligible for systemic chemotherapy. We conducted a clinical study to evaluate the role of gefitinib, an epidermal growth factor receptor tyrosine kinase inhibitor, in such patients. METHODS: Eligible patients were enrolled into the study and were treated with gefitinib at a dose of 250 mg/day orally until disease progression, development of intolerable adverse effects, or withdrawal of consent. The primary end point of the study was progression-free survival. The secondary end points were stable disease, overall survival, and toxicity. RESULTS: From January 2008 to June 2011, a total of 20 patients were enrolled. Median age was 52 years and median disease-free interval was 15 months. Twelve patients presented with locoregional recurrence, 2 patients presented with distant metastases, and 6 patients presented with both locoregional recurrence and distant metastasis. Median duration of gefitinib therapy was 4 months. One patient had complete response, 1 patient had partial response, 4 patients had stable disease, and 14 patients had progressive disease. The median progression-free survival and overall survival were 4 months and 5 months, respectively. Only 1 patient had severe drug-related toxicity. CONCLUSIONS: Gefitinib is safe and seems to be effective in recurrent or metastatic cervical carcinoma. Further studies are warranted to identify the subgroup of patients, based on epidermal growth factor receptor mutations, who are more likely to benefit.


Assuntos
Antineoplásicos/uso terapêutico , Recidiva Local de Neoplasia/tratamento farmacológico , Quinazolinas/uso terapêutico , Neoplasias do Colo do Útero/tratamento farmacológico , Adulto , Antineoplásicos/efeitos adversos , Intervalo Livre de Doença , Feminino , Gefitinibe , Humanos , Índia/epidemiologia , Pessoa de Meia-Idade , Recidiva Local de Neoplasia/epidemiologia , Estudos Prospectivos , Quinazolinas/efeitos adversos , Neoplasias do Colo do Útero/mortalidade
14.
J Contemp Brachytherapy ; 15(4): 261-268, 2023 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-37799125

RESUMO

Purpose: Interstitial brachytherapy (ISBT) is indicated for intact cervical carcinoma (IN-CC) if intracavitary brachytherapy (ICRT) is not feasible and also in vault carcinoma (VA-C). We aimed to evaluate the doses to pelvic lymph node regions in IN-CC and VA-C treated with ISBT. Material and methods: Ten patients (6 IN-CC, 4 VA-C) were chosen for this dosimetric study. IN-CC had a central tandem in addition to the needles. External iliac (EI-N), internal iliac (II-N), obturator (OB-N) and sacral (SA-N) groups of lymph nodes were delineated. A dose of 10 grays (Gy) and 8 Gy each × 2 fractions was prescribed to the target in IN-CC and VA-C respectively. Doses received by 100%, 90% and 50% volume (D100, D90, D50) and D2cc, D1cc, D0.1cc were evaluated. Doses to lymph nodal groups in IN-CC vs. VA-C were compared using Student's t-test. Results: For 20 implants, the median number of needles was 18 (range, 16-20). Mean D90 and D2cc of the combined bilateral OB-N, II-N, EI-N and SA-N groups were 33.62 ±3.46% and 102.94 ±10.71%, 6.98 ±0.65% and 39.69 ±3.64%, 5.1 ±0.51% and 15.4 ±0.8%, 7.76 ±0.95% and 15.36 ±1.09% of the prescribed doses respectively. Patients with a central tandem (IN-CC) received significantly higher doses to external, internal iliac and sacral group of lymph nodes (p < 0.001) as compared to VA-C. Conclusions: In patients with cervical carcinoma treated with ISBT, pelvic lymph node groups received significant doses. The dose contribution to pelvic lymph nodes is higher in patients with intact cervical cancer where a central tandem is used as compared to post-operative patients.

15.
Brachytherapy ; 22(4): 562-569, 2023.
Artigo em Inglês | MEDLINE | ID: mdl-37193616

RESUMO

INTRODUCTION: Brachytherapy (BT) is integral in treatment of gynecological malignancies and is also an option for many other cancers. Data on training and proficiency levels of early career oncologists is limited. Like other continents a survey was conducted for early career oncologists in India. METHODS AND MATERIALS: An online survey was conducted from November 2019 to February 2020, through Association of Radiation Oncologists of India (AROI) for early career radiation oncologists expected to be within 6 years of training. The survey used a 22 item questionnaire that was also used for European survey. Responses to individual statements were recorded on a 1-5 Likert-type scale. Descriptive statistics were used to describe proportions. RESULTS: One-hundred twenty-four (17%) of 700 recipients responded to the survey. Majority of the respondents (88%) stated that being able to perform BT at the end of their training was important. Two-thirds of the respondents (81/124) had performed >10 intracavitary procedure and 22.5% had performed >10 intracavitary-interstitial implants. Many respondents had not performed nongynecological procedure- breast (64%), prostate(82%), gastro-intestinal (47%). Respondents predicted that in next 10 years, the role of BT is likely to increase. Lack of dedicated curriculum and training was perceived as the greatest barriers to achieving independence in BT (58%). Respondents suggested that BT training should be prioritized during conferences (73%) and online teaching modules (56%), along with development of BT skills labs (65%). CONCLUSION: This survey identified a lack of proficiency in gynecological intracavitary-interstitial brachytherapy and non-gynecological brachytherapy, despite BT training being regarded as highly important. Dedicated programs, including standardized curriculum and assessment need to be developed for training early- career radiation oncologists in BT.


Assuntos
Braquiterapia , Neoplasias , Masculino , Humanos , Braquiterapia/métodos , Inquéritos e Questionários , Currículo , Índia
16.
Curr Opin Obstet Gynecol ; 24(1): 24-30, 2012 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-22143288

RESUMO

PURPOSE OF REVIEW: Vulvar cancer is a relatively rare gynecological malignancy afflicting elderly women. Although radiation therapy plays an important role, due to limited literature, treatment guidelines are less clearly defined. This article reviews the recent literature to discuss the current role of radiation therapy in the management of vulvar cancer. RECENT FINDINGS: There is a continuing scarcity of prospective and randomized controlled trials due to rarity of vulvar cancer. Most studies in the recent literature are largely retrospective in nature. However, it is evident from the available literature that combined chemoradiotherapy is slowly evolving as a new option in the management of locally advanced vulvar cancer (LAVC) reducing surgery-related morbidity. Various trials have tested the feasibility of concurrent chemoradiotherapy (CCRT) using different chemotherapeutic agents like cisplatin, 5-fluorouracil, mitomycin-C and have shown encouraging results. SUMMARY: For early-stage vulvar cancer, radiation therapy continues to play an adjuvant role. For LAVC, CCRT has emerged as a new feasible option both as preoperative and definitive treatment. Future CCRT trials should incorporate newer radiation therapy techniques like intensity-modulated radiation therapy to further reduce the radiation-related morbidity thus enhancing the tolerance of CCRT.


Assuntos
Protocolos de Quimioterapia Combinada Antineoplásica/uso terapêutico , Carcinoma de Células Escamosas/radioterapia , Recidiva Local de Neoplasia/radioterapia , Neoplasias Vulvares/radioterapia , Idoso , Carcinoma de Células Escamosas/tratamento farmacológico , Carcinoma de Células Escamosas/epidemiologia , Quimiorradioterapia Adjuvante , Cisplatino/administração & dosagem , Feminino , Fluoruracila/administração & dosagem , Humanos , Recidiva Local de Neoplasia/tratamento farmacológico , Recidiva Local de Neoplasia/epidemiologia , Guias de Prática Clínica como Assunto , Dosagem Radioterapêutica , Neoplasias Vulvares/tratamento farmacológico , Neoplasias Vulvares/epidemiologia
17.
Artigo em Inglês | MEDLINE | ID: mdl-34426088

RESUMO

Primary surgical management is successful as the sole therapeutic modality in the majority of women with early-stage cervical, vaginal and vulvar cancer, but the presence of certain risk factors in the surgico-pathological specimen indicates a poorer prognosis. Adjuvant treatment can improve overall survival in such cases. Important risk factors in cervical cancer include intermediate-risk factors (large tumor size, deep cervical stromal invasion, lymph-vascular space invasion) and high-risk factors (positive or close margins, lymph nodes, or parametrial involvement). In vulvar cancer, positive margins and lymph nodes are the two most important factors for adjuvant therapy. Radiation therapy has been the mainstay of adjuvant therapy in these cancers, supplemented by chemotherapy. Recent advances have witnessed the inclusion of newer therapeutic modalities such as immunotherapy. This review addresses the current status of various adjuvant therapeutic modalities for these gynecological cancers.


Assuntos
Neoplasias do Colo do Útero , Neoplasias Vulvares , Quimioterapia Adjuvante , Feminino , Humanos , Histerectomia , Excisão de Linfonodo , Estadiamento de Neoplasias , Prognóstico , Neoplasias do Colo do Útero/patologia , Neoplasias Vulvares/terapia
18.
Am J Transl Res ; 14(2): 927-941, 2022.
Artigo em Inglês | MEDLINE | ID: mdl-35273696

RESUMO

INTRODUCTION: Prognostic scores in Ewing sarcoma including baseline clinical and laboratory characteristics are necessary for pre-treatment risk stratification. In this study, we formulated and validated a prognostic model for baseline risk categorization in Ewing sarcoma. MATERIALS AND METHODS: A retrospective single-institutional study was conducted on Ewing sarcoma patients treated uniformly between January 2003 and December 2018. Baseline clinical/pathological characteristics and survival outcomes were noted from medical records. The cohort was randomised into a derivation and validation cohort. A prognostic score was formulated by including independent prognostic factors from the derivation cohort by multivariable analysis. The prognostic model was validated in the validation cohort along with estimation of its predictive ability. RESULTS: A total of 860 patients were included with 40.3% having baseline metastases. Tumor diameter >5 cm (HR 2.04; P<0.001; score 2), baseline metastases (HR 2.33; P<0.001, score 2), and total leucocyte count >11000/mm3 (HR 1.44; P=0.015; score 1) were independent predictors of overall survival in derivation cohort and included for prognostic score calculation. Patients were categorized into low (score 0), intermediate (score 1-3) and high-risk (score 4-5) groups. Harrell's c-indexes of the model were 0.625, 0.622 and 0.624 in the derivation, validation and whole cohort respectively. The timed AUC of ROC of the prognostic score-group for 5-year survival was 0.72, 0.71 and 0.73 in the derivation, validation and whole cohort respectively. CONCLUSIONS: We have formulated and validated a prognostic score for Ewing sarcoma incorporating baseline clinical and laboratory parameters, with fair predictive ability for risk stratification and facilitating risk-adapted personalized therapy.

19.
Int J Gynaecol Obstet ; 155 Suppl 1: 28-44, 2021 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-34669203

RESUMO

Since the publication of the 2018 FIGO Cancer Report, giant strides have been made in the global effort to reduce the burden of cervical cancer, with the World Health Organization (WHO) rolling out a global strategy for cervical cancer elimination, aiming for implementation by 2030. In over 130 countries, including low- and middle-income countries, HPV vaccination is now included in the national program. Screening has seen major advances with wider implementation of HPV testing. These interventions will take a few years to show their impact. Meanwhile, over half a million new cases are added each year. FIGO's revised staging of cervical cancer (2018) has been widely implemented and retrospective analyses of data based on the new staging have been published. Minimally invasive surgery has been shown to be disadvantageous in women with cervical cancer. This chapter discusses the management of cervical cancer based on the stage of disease, including attention to palliation and quality of life issues.


Assuntos
Infecções por Papillomavirus , Neoplasias do Colo do Útero , Feminino , Humanos , Infecções por Papillomavirus/diagnóstico , Infecções por Papillomavirus/epidemiologia , Infecções por Papillomavirus/prevenção & controle , Qualidade de Vida , Estudos Retrospectivos , Neoplasias do Colo do Útero/diagnóstico , Neoplasias do Colo do Útero/epidemiologia , Neoplasias do Colo do Útero/prevenção & controle
20.
J Cancer Res Ther ; 17(2): 295-302, 2021.
Artigo em Inglês | MEDLINE | ID: mdl-34121671

RESUMO

The world is fighting the onslaught of COVID 19 for the last 10 months, ever since the first case was reported in December 2019 in Wuhan, China. Now, it has spread to over 200 countries. COVID 19-associated respiratory syndrome is causing a lot of mortality and morbidity. There are reports suggesting that the complications and ARDS associated with COVID 19 is an immune response reaction. The cytokine storm associated with severe cases of COVID 19 acts as a cause of death in many sick patients. It has been shown that COVID 19 is associated with a peculiar immune profile: Decrease in CD3, CD4, CD8, natural killer cell and B-cells; Rise in interleukin (IL)-4, IL-6 and tumor necrosis factor (TNF) alpha; Decrease in IL-10; Decrease in interferon-gamma. Low-dose radiotherapy (LDRT) immunosuppressive features resulting from M2 macrophage phenotype activation, increase in IL-10, transforming growth factor beta, a decrease in IL-6, TNF alpha and an increase in CD3, CD4, and CD8 T cell counts may negate the harmful effects of cytokine release syndrome. Literature review shows that radiation was previously used to treat viral pneumonia with a good success rate. This practice was discontinued in view of the availability of effective antibiotics and antivirals. As there are no scientifically proven treatment for severe COVID 19-associated respiratory distress today, it is prudent that we understand the benefits of LDRT at this critical juncture and take rational decisions to treat the same. This article provides an radioimmunological rationale for the treatment of immune crisis mediated complications in severe cases of COVID 19.


Assuntos
COVID-19/radioterapia , Síndrome da Liberação de Citocina/radioterapia , Terapia de Imunossupressão/métodos , SARS-CoV-2/imunologia , COVID-19/complicações , COVID-19/imunologia , COVID-19/virologia , Tomada de Decisão Clínica , Síndrome da Liberação de Citocina/imunologia , Síndrome da Liberação de Citocina/virologia , Humanos , Terapia de Imunossupressão/efeitos adversos , Dosagem Radioterapêutica , Índice de Gravidade de Doença , Resultado do Tratamento
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