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1.
Cancer ; 130(14): 2528-2537, 2024 Jul 15.
Artículo en Inglés | MEDLINE | ID: mdl-38373062

RESUMEN

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.


Asunto(s)
Neoplasias , Humanos , India/epidemiología , Neoplasias/terapia , Neoplasias/economía , Neoplasias/radioterapia , Neoplasias/epidemiología , Niño , Terapia de Protones/economía , Adulto , Necesidades y Demandas de Servicios de Salud/economía , Análisis Costo-Beneficio
2.
Pediatr Blood Cancer ; 70(3): e30135, 2023 03.
Artículo en Inglés | MEDLINE | ID: mdl-36524611

RESUMEN

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.


Asunto(s)
Neoplasias Óseas , Osteosarcoma , Sarcoma de Ewing , Sarcoma , Humanos , Adolescente , Estudios Retrospectivos , Neoplasias Óseas/diagnóstico , Neoplasias Óseas/terapia , Sarcoma de Ewing/diagnóstico , Sarcoma de Ewing/terapia , Sarcoma/patología
3.
Int Orthop ; 47(5): 1361-1372, 2023 05.
Artículo en Inglés | MEDLINE | ID: mdl-36847800

RESUMEN

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.


Asunto(s)
Neoplasias Óseas , Osteosarcoma , Humanos , Adolescente , Adulto Joven , Adulto , Estudios Retrospectivos , Autoinjertos , Centros de Atención Terciaria , Resultado del Tratamiento , Trasplante Óseo/efectos adversos , Trasplante Óseo/métodos , Neoplasias Óseas/radioterapia , Neoplasias Óseas/cirugía , Neoplasias Óseas/patología , Osteosarcoma/radioterapia , Osteosarcoma/cirugía , Peroné/trasplante
4.
Breast J ; 23(6): 731-735, 2017 Nov.
Artículo en Inglés | MEDLINE | ID: mdl-27886418

RESUMEN

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.


Asunto(s)
Neoplasias de la Mama/diagnóstico , Infecciones por VIH , Infarto del Miocardio/diagnóstico , Neoplasias del Cuello Uterino/diagnóstico , Neoplasias de la Mama/complicaciones , Neoplasias de la Mama/tratamiento farmacológico , Neoplasias de la Mama/cirugía , Diagnóstico Diferencial , Femenino , Humanos , Persona de Mediana Edad , Infarto del Miocardio/complicaciones , Infarto del Miocardio/tratamiento farmacológico , Neoplasias del Cuello Uterino/complicaciones , Neoplasias del Cuello Uterino/tratamiento farmacológico , Neoplasias del Cuello Uterino/cirugía
5.
J Obstet Gynaecol Res ; 43(1): 238-242, 2017 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-27928856

RESUMEN

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.


Asunto(s)
Enfermedades Renales/complicaciones , Enfermedades Renales/radioterapia , Riñón/anomalías , Radioterapia de Intensidad Modulada/métodos , Neoplasias del Cuello Uterino/complicaciones , Neoplasias del Cuello Uterino/radioterapia , Quimioradioterapia/métodos , Medios de Contraste , Fraccionamiento de la Dosis de Radiación , Femenino , Humanos , Riñón/diagnóstico por imagen , Enfermedades Renales/diagnóstico por imagen , Persona de Mediana Edad , Estadificación de Neoplasias , Posmenopausia , Tomografía Computarizada por Rayos X , Resultado del Tratamiento , Neoplasias del Cuello Uterino/diagnóstico por imagen , Neoplasias del Cuello Uterino/patología
7.
World J Surg ; 40(8): 2036-42, 2016 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-27220508

RESUMEN

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.


Asunto(s)
Neoplasias de la Mama/patología , Ganglios Linfáticos/diagnóstico por imagen , Metástasis Linfática/diagnóstico por imagen , Estadificación de Neoplasias/métodos , Tomografía Computarizada por Tomografía de Emisión de Positrones , Adulto , Femenino , Fluorodesoxiglucosa F18 , Humanos , Persona de Mediana Edad , Estudios Prospectivos , Radiofármacos
8.
Childs Nerv Syst ; 31(12): 2341-4, 2015 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-26438548

RESUMEN

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.


Asunto(s)
Antineoplásicos Alquilantes/uso terapéutico , Neoplasias Encefálicas/tratamiento farmacológico , Neoplasias Encefálicas/radioterapia , Dacarbazina/análogos & derivados , Gliosarcoma/tratamiento farmacológico , Gliosarcoma/radioterapia , Adolescente , Niño , Terapia Combinada , Dacarbazina/uso terapéutico , Femenino , Estudios de Seguimiento , Humanos , Masculino , Estudios Retrospectivos , Análisis de Supervivencia , Tasa de Supervivencia , Temozolomida , Adulto Joven
9.
Int J Gynecol Cancer ; 24(2): 312-20, 2014 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-24407578

RESUMEN

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.


Asunto(s)
Carcinoma/diagnóstico por imagen , Fluorodesoxiglucosa F18 , Recurrencia Local de Neoplasia/diagnóstico por imagen , Radiofármacos , Neoplasias del Cuello Uterino/diagnóstico por imagen , Adulto , Anciano , Carcinoma/mortalidad , Carcinoma/terapia , Femenino , Humanos , India/epidemiología , Persona de Mediana Edad , Recurrencia Local de Neoplasia/mortalidad , Recurrencia Local de Neoplasia/terapia , Tomografía de Emisión de Positrones , Estudios Prospectivos , Sobrevida , Neoplasias del Cuello Uterino/mortalidad , Neoplasias del Cuello Uterino/terapia
10.
J Cancer Res Ther ; 20(3): 943-948, 2024 Apr 01.
Artículo en Inglés | MEDLINE | ID: mdl-39023602

RESUMEN

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.


Asunto(s)
Médula Ósea , COVID-19 , Órganos en Riesgo , Dosificación Radioterapéutica , Planificación de la Radioterapia Asistida por Computador , Radioterapia de Intensidad Modulada , SARS-CoV-2 , Humanos , COVID-19/prevención & control , Radioterapia de Intensidad Modulada/métodos , Radioterapia de Intensidad Modulada/efectos adversos , Persona de Mediana Edad , Masculino , Órganos en Riesgo/efectos de la radiación , Adulto , Planificación de la Radioterapia Asistida por Computador/métodos , Médula Ósea/efectos de la radiación , Femenino , Pulmón/efectos de la radiación , Pulmón/diagnóstico por imagen , Radiometría/métodos , Tomografía Computarizada por Rayos X/métodos , Neoplasias Inducidas por Radiación/etiología , Neoplasias Inducidas por Radiación/prevención & control
11.
J Cancer Res Ther ; 20(1): 1-8, 2024 Jan 01.
Artículo en Inglés | MEDLINE | ID: mdl-38554291

RESUMEN

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.


Asunto(s)
Adenocarcinoma , Neoplasias de la Tiroides , Humanos , Adenocarcinoma/radioterapia , Radioisótopos de Yodo , Neoplasias de la Tiroides/radioterapia , Neoplasias de la Tiroides/patología
12.
J Cancer Res Ther ; 20(3): 930-934, 2024 Apr 01.
Artículo en Inglés | MEDLINE | ID: mdl-39023600

RESUMEN

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.


Asunto(s)
Braquiterapia , Dosificación Radioterapéutica , Neoplasias Cutáneas , Humanos , Braquiterapia/efectos adversos , Braquiterapia/métodos , Masculino , Persona de Mediana Edad , Neoplasias Cutáneas/radioterapia , Neoplasias Cutáneas/patología , Femenino , Estudios Retrospectivos , Anciano , Adulto , Radioisótopos de Iridio/uso terapéutico , Resultado del Tratamiento , Planificación de la Radioterapia Asistida por Computador/métodos , Carcinoma Basocelular/radioterapia , Carcinoma Basocelular/patología , Estudios de Seguimiento , Carcinoma de Células Escamosas/radioterapia , Carcinoma de Células Escamosas/patología , Calidad de Vida
13.
Int J Gynecol Cancer ; 23(4): 705-9, 2013 May.
Artículo en Inglés | MEDLINE | ID: mdl-23466569

RESUMEN

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.


Asunto(s)
Antineoplásicos/uso terapéutico , Recurrencia Local de Neoplasia/tratamiento farmacológico , Quinazolinas/uso terapéutico , Neoplasias del Cuello Uterino/tratamiento farmacológico , Adulto , Antineoplásicos/efectos adversos , Supervivencia sin Enfermedad , Femenino , Gefitinib , Humanos , India/epidemiología , Persona de Mediana Edad , Recurrencia Local de Neoplasia/epidemiología , Estudios Prospectivos , Quinazolinas/efectos adversos , Neoplasias del Cuello Uterino/mortalidad
14.
J Contemp Brachytherapy ; 15(4): 261-268, 2023 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-37799125

RESUMEN

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.
Artículo en Inglés | MEDLINE | ID: mdl-37193616

RESUMEN

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.


Asunto(s)
Braquiterapia , Neoplasias , Masculino , Humanos , Braquiterapia/métodos , Encuestas y Cuestionarios , Curriculum , India
16.
Curr Opin Obstet Gynecol ; 24(1): 24-30, 2012 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-22143288

RESUMEN

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.


Asunto(s)
Protocolos de Quimioterapia Combinada Antineoplásica/uso terapéutico , Carcinoma de Células Escamosas/radioterapia , Recurrencia Local de Neoplasia/radioterapia , Neoplasias de la Vulva/radioterapia , Anciano , Carcinoma de Células Escamosas/tratamiento farmacológico , Carcinoma de Células Escamosas/epidemiología , Quimioradioterapia Adyuvante , Cisplatino/administración & dosificación , Femenino , Fluorouracilo/administración & dosificación , Humanos , Recurrencia Local de Neoplasia/tratamiento farmacológico , Recurrencia Local de Neoplasia/epidemiología , Guías de Práctica Clínica como Asunto , Dosificación Radioterapéutica , Neoplasias de la Vulva/tratamiento farmacológico , Neoplasias de la Vulva/epidemiología
17.
Artículo en Inglés | MEDLINE | ID: mdl-34426088

RESUMEN

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.


Asunto(s)
Neoplasias del Cuello Uterino , Neoplasias de la Vulva , Quimioterapia Adyuvante , Femenino , Humanos , Histerectomía , Escisión del Ganglio Linfático , Estadificación de Neoplasias , Pronóstico , Neoplasias del Cuello Uterino/patología , Neoplasias de la Vulva/terapia
18.
Am J Transl Res ; 14(2): 927-941, 2022.
Artículo en Inglés | MEDLINE | ID: mdl-35273696

RESUMEN

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.
Artículo en Inglés | MEDLINE | ID: mdl-34669203

RESUMEN

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.


Asunto(s)
Infecciones por Papillomavirus , Neoplasias del Cuello Uterino , Femenino , Humanos , Infecciones por Papillomavirus/diagnóstico , Infecciones por Papillomavirus/epidemiología , Infecciones por Papillomavirus/prevención & control , Calidad de Vida , Estudios Retrospectivos , Neoplasias del Cuello Uterino/diagnóstico , Neoplasias del Cuello Uterino/epidemiología , Neoplasias del Cuello Uterino/prevención & control
20.
J Cancer Res Ther ; 17(2): 295-302, 2021.
Artículo en Inglés | MEDLINE | ID: mdl-34121671

RESUMEN

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.


Asunto(s)
COVID-19/radioterapia , Síndrome de Liberación de Citoquinas/radioterapia , Terapia de Inmunosupresión/métodos , SARS-CoV-2/inmunología , COVID-19/complicaciones , COVID-19/inmunología , COVID-19/virología , Toma de Decisiones Clínicas , Síndrome de Liberación de Citoquinas/inmunología , Síndrome de Liberación de Citoquinas/virología , Humanos , Terapia de Inmunosupresión/efectos adversos , Dosificación Radioterapéutica , Índice de Severidad de la Enfermedad , Resultado del Tratamiento
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