Author of

• 28971

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  Lunch & Poster Display session (ID 58)

  • Event: ELCC 2019
  • Type: Poster Display session
  • Track:
  • Presentations: 1
  • Moderators:
  • Coordinates: 4/11/2019, 12:30 - 13:00, Hall 1

  • 29050

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    97P - Pattern of first-site failure and salvage treatment in patients with inoperable stage III non-small cell lung cancer after chemoradiotherapy (ID 590)

    12:30 - 13:00  |  Author(s): Nina-Sophie Schmidt-Hegemann
    • Abstract

    Background
    

    The standard of care treatment for inoperable stage III NSCLC is concurrent chemoradiotherapy (CRT) followed by consolidation with durvalumab. Loco-regional and distant recurrences remain common. Herein, we examine pattern of first-site failure and salvage treatment.

    a9ded1e5ce5d75814730bb4caaf49419 Methods
    

    We analysed the medical charts of 99 patients treated with CRT. Scans from date of first-site failure were fused with the delivered treatment plans. Recurrences were identified as in-field recurrence (IFR), out-of-field recurrence (OFR) [outside 50Gy isodose line] and distant metastases (DM). Using the Kaplan-Meier method with log-rank test for univariate analysis, the effect of salvage surgery (S), radiotherapy (sRT), chemotherapy (sCT) and immunotherapy (sIO) on overall survival (OS) was evaluated.

    20c51b5f4e9aeb5334c90ff072e6f928 Results
    

    With a median follow-up of 17.2 months, the mOS for all patients was 20.8 months. 26 patients (26%) with IFR had a mOS of 19.3 months. In patients who survived at least 12 months from initial diagnosis (74%), IFR was a significant negative prognosticator (mOS 19.3 vs 40.0 months; p < 0.001). 25 (25%) patients developed OFR with no significant impact on survival (27.1 vs 20.8 months, p = 0.313). 3 (12%) patients with OFR underwent salvage surgery (p = 0.057) and were still alive at the time of this analysis. 5 (20%) patients underwent sRT with a mOS of 71.2 vs 19.1 months (p = 0.014). 13 (52%) patients with OFR received sCT; mOS 26.4 vs 32.7 mo. (p = 0.644;) and 4(16%) pts received sIO (mOS: 64.6 vs 26.4 months; p = 0.222). Distant and brain relapse were detected in 42 (42%) and 16 (16%) patients; mOS 19.1 vs. 22.9 months (p = 0.819) and 19.1 vs 20.8 mo. (p = 0.635), respectively. 15 (94%) patients with brain relapse received cranial radiotherapy: 7 (47%) whole brain irradiation and 8 (53%) stereotactic radiosurgery (mOS 15.3 vs. 37.8 mo.; p = 0.064).

    fd69c5cf902969e6fb71d043085ddee6 Conclusions
    

    IFR was a significant negative predictor of OS in patients, who survived >1 year after initial diagnosis. Patients with OFR benefit most from salvage operation and/or radiotherapy. Furthermore, we observed survival benefit in patients who received SRS vs. WBRT for brain relapse.

    b651e8a99c4375feb982b7c2cad376e9 Legal entity responsible for the study
    

    The authors.

    213f68309caaa4ccc14d5f99789640ad Funding
    

    Has not received any funding.

    682889d0a1d3b50267a69346a750433d Disclosure
    

    All authors have declared no conflicts of interest.

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