RESUMEN
The use of stereotactic body radiation therapy (SBRT) to treat non-spine bone metastases (NSBM) is becoming increasingly common in clinical practice. The clinical advantages of SBRT include good pain control and high local control rates, although only limited data are available. The Spanish Society of Radiation Oncology (SEOR) SBRT group recently convened a task force of experts in the field to address key questions related to SBRT for NSBM, including treatment indications, planning, techniques, and dose fractionation. The task force reviewed the available literature to develop evidence-based recommendations for the safe application of NSBM SBRT and to standardize and optimize SBRT processes. The present document provides a comprehensive analysis of the available data, including ongoing clinical trials and controversies, providing clinically applicable recommendations.
Asunto(s)
Neoplasias Óseas/radioterapia , Neoplasias Óseas/secundario , HumanosRESUMEN
PURPOSE: SBRT (stereotactic body radiation therapy) is widely used as a curative treatment in tumoral lesions and has become a fundamental tool for the treatment of spine metastasis. In this study, we present survival and toxicity outcomes of spine SBRT after a 2-year follow-up. METHODS/PATIENTS: Data from spine SBRT treatments performed at our institution between March 2012 and February 2020 was collected. Medical records, including demographic, primary tumor, and treatment characteristics were reviewed. Patient follow-up included clinical evaluation, imaging, and blood tests. Toxicity was recorded according to CTCAE v4.0. RESULTS: We analyzed 73 consecutive spine SBRT treatments in 60 patients. 39.7% of the cases had primary breast cancer and 23.3% had prostate cancer. Most cases (87.7%) were treated with a single SBRT fraction of 16 Gy. Median follow-up was 26.1 months (range 1.7-78.6), and 1- and 2-year overall survival (OS) rates were 96.9% and 84.2%, respectively. Local control (LC) rates at 1- and 2-years were 76.3% and 70.6%, respectively. Multivariate analysis identified histology as a prognostic factor for both OS and LC. Patients who underwent spine SBRT 6 months after the spinal lesion diagnosis had LC at 2 years of 88%, vs 61.7% for those who underwent SBRT before this period. No grade III or higher toxicity was reported. The vertebral compression fracture (VCF) rate was 4.1%. CONCLUSION: Spine SBRT at our institution showed a 2-year LC of 70.6%, without G3 toxicities. Delaying SBRT at least 6 months to administer systemic treatment was related to an improvement in local control.
Asunto(s)
Radiocirugia , Neoplasias de la Columna Vertebral/radioterapia , Adulto , Anciano , Anciano de 80 o más Años , Femenino , Humanos , Masculino , Persona de Mediana Edad , Radiocirugia/efectos adversos , Estudios Retrospectivos , Neoplasias de la Columna Vertebral/mortalidad , Neoplasias de la Columna Vertebral/secundario , Tasa de Supervivencia , Factores de Tiempo , Tiempo de Tratamiento , Resultado del TratamientoRESUMEN
AIM: Radiation oncology services in Spain are undergoing a process of technical modernization, but-in a context of increasing demand by an ageing population-it is unclear whether there are enough radiation oncologists to staff the newly equipped units. This study aims to assess the number of specialists working in radiation oncology services in Spain relative to current and future needs. MATERIALS AND METHODS: In the second half of 2017, the Commission on Infrastructures of the Spanish Society for Radiation Oncology (SEOR) sent a questionnaire on radiation oncology staff to the heads of all 122 public (n = 76, 62%) and private (n = 46, 38%) radiation oncology services in Spain. Data collected were the number of professionals, their position, and their year of birth for specialists and residents in each service. In the descriptive analysis, for continuous variables we calculated means, standard deviations and ranges for each Spanish region and work post. For qualitative variables, we constructed frequency tables. All analyses were performed with R statistical software, version 3.5.1. RESULTS: The survey response rate was 100% among service heads across all 122 centers. The total number of radiation oncologists working in these centers is 721, or 15.4 per million population, with considerable variations between regions. Given the national recommendations to have 20 radiation oncologists per million population, there is currently a deficit of 204 specialists. If the 163 upcoming retirements are also taken into account, there will be 367 fewer radiation oncologists than required to meet the 25% increase in indications for radiotherapy projected for 2025. CONCLUSIONS: The classic model for calculating staff needs based on the number of treatments is outdated, and recommendations should be revised to reflect the current reality. A new model should integrate the most complex technological advances and emerging plans in radiotherapy, without neglecting the other activities carried out in radiation oncology services that are not directly linked to patient care.
Asunto(s)
Oncólogos de Radiación/provisión & distribución , Oncología por Radiación/estadística & datos numéricos , Adulto , Distribución por Edad , Anciano , Femenino , Humanos , Internado y Residencia/estadística & datos numéricos , Masculino , Persona de Mediana Edad , Médicos Mujeres/provisión & distribución , Distribución por Sexo , España , Encuestas y Cuestionarios/estadística & datos numéricosRESUMEN
PURPOSE: Planning for radiation oncology requires reliable estimates of both demand for radiotherapy and availability of technological resources. This study compares radiotherapy resources in the 17 regions of the decentralised Spanish National Health System (SNHS). MATERIALS AND METHODS: The Sociedad Española de Oncología Radioterápica (SEOR) performed a cross-sectional survey of all Spanish radiation oncology services (ROS) in 2015. We collected data on SNHS radiotherapy units, recording the year of installation, specific features of linear accelerators (LINACs) and other treatment units, and radiotherapeutic techniques implemented by region. Any machine over 10 years old or lacking a multileaf collimator or portal imaging system was considered obsolete. We performed a k-means clustering analysis using the Hartigan-Wong method to test associations between the gross domestic regional product (GDRP), the number of LINACs per million population and the percentage of LINACs over 10 years old. RESULTS: The SNHS controls 72 (61%) of the 118 Spanish ROS and has 180 LINACs, or 72.5% of the total public and private resources. The mean rate of LINACs per million population is 3.9 for public ROS, and 42% (n = 75) of the public accelerators were obsolete in 2015: 61 due to age and 14 due to technological capability. There was considerable regional variation in terms of the number and technological capacity of radiotherapy units; correlation between GRDP and resource availability was moderate. CONCLUSION: Despite improvements, new investments are still needed to replace obsolete units and increase access to modern radiotherapy. Regular analysis of ROS in each Spanish region is the only strategy for monitoring progress in radiotherapy capacity.