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M. Verheij



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    MO23 - Radiotherapy II: Lung Toxicity, Target Definition and Quality Assurance (ID 107)

    • Event: WCLC 2013
    • Type: Mini Oral Abstract Session
    • Track: Radiation Oncology + Radiotherapy
    • Presentations: 1
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      MO23.03 - Dutch Radiotherapy Lung Audit: Results of a National Pilot (ID 2128)

      10:30 - 12:00  |  Author(s): M. Verheij

      • Abstract
      • Presentation
      • Slides

      Background
      The Dutch Society for Radiotherapy and Oncology (NVRO) aims to ensure transparency regarding clinical outcome, quality and safety of lung cancer treatments in radiotherapy departments throughout The Netherlands. Auditing is considered the best instrument to achieve this. The quality of the radiotherapy will become transparent by using objective and reliable data from accurate registration of clinical outcome linked to patient and treatment characteristics The results of the audit are communicated to the health professionals that supplied the data. This outcome registration will provide the local health professionals with a robust instrument to compare and improve their lung cancer treatments. The decision was made to seek collaboration with the thoracic surgeons as their group were already committed to the DICA (Dutch Institute for Clinical Auditing) .

      Methods
      The Quality Assurance Committee of the NVRO, in collaboration with a platform of Dutch radiation oncologists dedicated to lung cancer treatment, received a grant to set-up a quality assurance program for lung cancer treatment. Quality indicators to be collected were defined within the platform of Dutch radiation oncologists and a database was setup in October 2012. All patients receiving primary thoracic radiation treatment with curative intent for (primary or recurrent) stage I-IIIB lung cancer will be included in the registry. Information will be collected on patient, tumor and treatment characteristics, the incidence and severity of acute toxicity, mortality within three months of radical radiotherapy and the time interval between diagnostic work-up and start of radiotherapy The adherence to the NVRO and Dutch guidelines will be registered and analyzed, as well as the use of new treatment techniques like stereotactic radiotherapy and image-guided radiotherapy. A pilot phase was initiated to test the feasibility of enrolling patients from six participating centers.

      Results
      The pilot-database was tested in 6 Dutch centers: NKI-AVL (Amsterdam), MAASTRO clinic (Maastricht), RIF (Leeuwarden), RISO (Deventer), UMC Radboud (Nijmegen) and ARTI (Arnhem). A total of 196 patients were entered from January to June 2013. Analysis of the patients entered is ongoing. We expect to have a national roll-out in October 2013. The patient records were very complete with a few exceptions: lung function tests, the Mean Lung Dose / Lung V20, gross tumor volume (23% missing) and the non-mandatory follow-up items. The mean age was 68 years (range 41-90) with 57% males. Charlson comorbidity index ≥ 2 was scored in 39% of patients. Most patients (66%) were cN+ with 14% T4 tumours. Most patients received IMRT or VMAT irradiation. Ninety-five percent of patients completed treatment. All registered patients had position verification during irradiation, mostly 3D (70%). Acute 3-month toxicity (grade≥ III) was registered in 18% of patients and 3-month mortality was 4.4%.

      Conclusion
      This national audit on outcome after radiotherapy is directed towards an improvement of care for lung cancer patients and will help to direct evidence into clinical practice. It is expected to have an important impact on quality assurance ,safety and possibly patient mortality.

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    P2.12 - Poster Session 2 - NSCLC Early Stage (ID 205)

    • Event: WCLC 2013
    • Type: Poster Session
    • Track: Medical Oncology
    • Presentations: 1
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      P2.12-005 - Results of radical treatment of non-small cell lung cancer patients with a single synchronous metastasis (ID 1103)

      09:30 - 16:30  |  Author(s): M. Verheij

      • Abstract

      Background
      Stage IV non-small cell lung cancer (NSCLC) patients are considered incurable and mainly treated for palliation. The purpose of this study is to investigate the overall survival (OS) and disease free survival (DFS) of NSCLC patients, diagnosed with synchronous oligometastatic disease treated with curative intent of the intrathoracic disease as well as the metastasis.

      Methods
      Patients treated between 2008 and 2013 were included in this retrospective analysis. Main inclusion criteria were: synchronous presentation of NSCLC and oligometastatic disease at diagnosis with only 1 extra-thoracic metastasis, and multidisciplinary consent on a radical treatment of both the intrathoracic disease and the solitary metastasis. Treatment of the intrathoracic disease consisted of radical radiotherapy (> 55 Gy biological effective dose) or surgical resection. Treatment of the metastasis consisted of radical/stereotactic radiotherapy or surgical resection or radiofrequency ablation (RFA).

      Results
      Twenty-two patients, 13 men and 9 women, were included. The mean age was 61 years (range 41-79) and all were in good condition (WHO 0-1). The sites of the solitary metastases were brain (13), bone (6), liver (1), soft tissue (1) and adrenal gland (1). The intrathoracic tumor stage (ignoring M-status) was IA in 2 patients, IB in 1 patient, IIA in 4 patients, IIB in 1 patient, IIIA in 8 patients and IIIB in 6 patients. Nineteen patients were treated with radiotherapy and 3 patients had a surgical intervention for the primary tumor. Eighteen patients (82%) received chemotherapy, 3 concurrently and 15 sequentially. The metastases were treated with ablative/stereotactic radiotherapy (19), surgical intervention (2) and RFA (1). The median follow-up was 47 months (95% CI 24-69). Seventeen patients developed recurrent disease of whom 12 died. Only 2 recurrence occurred within the irradiated area. Both infield recurrences were brain metastasis after a stereotactic irradiation of 15 Gy and 18 Gy. The other recurrences where mostly pulmonary (7) and brain metastases (6). The median DFS was 14 months (range 1-47, 95% CI 9 – 19) and the median OS was 32 months (95% CI 12– 52). The 1- and 2-year OS was 78.7% (95% CI 52.7-91.5) and 59.5% (95% CI 32.8-78.5), respectively. The 1- and 2-year DFS was 54.5% (95% CI 30.5-73.2) and 24.9% (95% CI 8.1-46.3), respectively.

      Conclusion
      Radical treatment of a highly selected group of NSCLC patients in good condition presenting with a single synchronous extra-thoracic metastasis resulted not only in adequate local control, but also in favorable long-term DFS and OS.