Author of

• 18975

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  P3.01 - Advanced NSCLC (ID 621)

  • Event: WCLC 2017
  • Type: Poster Session with Presenters Present
  • Track: Advanced NSCLC
  • Presentations: 1
  • Moderators:
  • Coordinates: 10/18/2017, 09:30 - 16:00, Exhibit Hall (Hall B + C)

  • 23865

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    P3.01-006 - Osimertinib in Pretreated EGFR T790M-Positive Non-Small Cell Lung Cancer Patients with Leptomeningeal Carcinomatosis (ID 7905)

    09:30 - 09:30  |  Author(s): K. Chen
    • Abstract
    • Slides

    Background:
    Leptomeningeal carcinomatosis (LC) is a detrimental complication of non-small cell lung cancer (NSCLC). Osimertinib is the current standard therapy for pretreated EGFR T790M-positive NSCLC patients. However, the efficacy of osimertinib for these patients with LC is unknown.
    
    Method:
    Retrospective case series of 5 patients with pretreated EGFR T790M-positive NSCLC who developed LC and received osimertinib therapy in an Expanded Access Program was reviewed. We evaluated the clinical outcomes of these patients.
    
    Result:
    Four female patients and one male patient (age, range 51-67) with EGFR T790M-positive NSCLC and LC received osimertinib therapy at a starting dose of 80 mg/day. EGFR T790M mutation was detected in three re-biopsied specimens and two plasma samples. Four patients had Eastern Cooperative Oncology Group performance status (PS) ≧ 2. One patient received whole-brain radiotherapy after commencing osimertinib therapy. Osimertinib dose escalation to 160 mg/day or 160 mg every other day was administered to 3 patients who did not respond to standard dose therapy. Radiologically decreased leptomeningeal enhancement was seen in 3 out of 4 evaluable patients, and improvement of clinical symptoms was recorded in 2 patients. Two patients died of aspiration pneumonia, and one died of hypoxic respiratory failure of unknown cause. Osimertinib therapy is ongoing in two patients at 80 mg/day for 9 and 10 months, respectively, with good tolerability.
    
    Conclusion:
    Osimertinib is well tolerated even in patients with poor PS. Clinical benefits were seen in some patients, and the optimal dose should be explored.
    
    

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