Author of

• 18606

  +

  P3.03 - Poster Session with Presenters Present (ID 473)

  • Event: WCLC 2016
  • Type: Poster Presenters Present
  • Track: Mesothelioma/Thymic Malignancies/Esophageal Cancer/Other Thoracic Malignancies
  • Presentations: 1
  • Moderators:
  • Coordinates: 12/07/2016, 14:30 - 15:45, Hall B (Poster Area)

  • 18635

    +

    P3.03-029 - EPP Followed by Hemithoracic IMRT - A Multicenter Study on Behalf of the Italian Association for Radiation Oncology Lung Cancer Study Group (ID 4684)

    14:30 - 14:30  |  Author(s): F. De Rose
    • Abstract

    Background:
    The treatment of MPM is not well defined. Although it has been shown that extrapleural pneumonectomy (EPP) followed by hemithoracic RT may improve survival in early-stage disease, this therapeutic approach is declining. This might be due to the recent publication of a randomized trial (SAKK 17/04) which assessed the effect of high-dose hemithoracic RT after EPP. The study reported poor outcomes and the results did not support the use of hemithoracic RT. The major weakness of the SAKK study is the heterogeneity of the radiation techniques and schedules, and that only 12 patients received IMRT. On this background we conducted the present study to assess the outcome of MPM patients treated with EPP and adjuvant IMRT.
    
    Methods:
    This is a retrospective multicenter study, including 5 academic centers in Italy. Seventy patients treated with EPP and adjuvant IMRT were enrolled. The majority (95%) of patients had an epithelioid histology. Sixty patients were affected by stage III-IVA disease. Fifty-four (77%) patients received neoadjuvant/adjuvant chemotherapy. The IMRT dose ranged between 50-60 Gy in 25-27 fractions. Radiation was interrupted in two patients due to systemic progression of disease.
    
    Results:
    Median follow-up was 14 months (range, 0-83 months). Rates of local control, loco-regional control, distant-metastases free survival (DMFS) and overall survival (OS) at 2 years were 73%, 63%, 39%, and 63%, respectively. Patients with stage I-II had a better 2-year OS and DMFS than those with advanced disease: 60% vs. 40% (p=0.09), and 78% vs. 32% (p=0.03), respectively. Three fatal pneumonitis were reported. Other major toxicities were: Grade 2-3 pneumonitis in 2 cases, 1 bronchial fistula, and 1 Grade 3 esophagitis.
    
    Conclusion:
    This multicenter study showed that EPP followed by hemithoracic IMRT is associated with high rate of local and loco-regional control, and showed that long-term survival can be achieved, even if some patients may experienced life-threatening lung toxicity. Distant metastasis represent the predominant pattern of failure.