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Philip Wong

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    MA08 - Clinical Trials in Brain Metastases (ID 906)

    • Event: WCLC 2018
    • Type: Mini Oral Abstract Session
    • Track: Advanced NSCLC
    • Presentations: 1
    • Moderators:
    • Coordinates: 9/24/2018, 15:15 - 16:45, Room 203 BD
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      MA08.11 - Early Safety Data of a Phase I/II Combining Nivolumab and Stereotactic Brain Radiosurgery for Treatment of Brain Metastases in Patients with NSCLC (ID 14064)

      16:20 - 16:25  |  Author(s): Philip Wong

      • Abstract
      • Presentation
      • Slides


      Radiotherapy can stimulate the immune system through various means. Highly cytotoxic stereotactic radiosurgery (SRS) doses (>10Gy per fraction) may synergize with anti-PD1 to reduce intracranial disease progression or recurrence.

      a9ded1e5ce5d75814730bb4caaf49419 Method

      Within a phase I/II trial evaluating the combination of nivolumab with SRS in the treatment of brain metastases from NSCLC and RCC (NCT02978404), 8 patients were enrolled (1 RCC and 7 NSCLC) in the first trial cohort. Herein, only the NSCLC cases are reviewed. Patients were eligible if their KPS ≥70, were minimally symptomatic (RTOG neurological function <2), and had ≤10cc of untreated brain metastases. Prophylactic corticosteroids were not given. Nivolumab (240mg IV q2 weeks) was started 2 weeks prior to SRS, and administered until RECIST progression. SRS (15-20Gy in 1 fraction) was given to each brain metastasis. The aim of the first patient cohort is to estimate the tolerability of the combined treatment strategy.

      4c3880bb027f159e801041b1021e88e8 Result

      The median follow-up of the three male and four female patients was 2 months. Median age was 63 years (55-84 years). Five NSCLC patients completed ≥1 cycle of nivolumab and SRS, and were evaluated for tolerability of the combination. One patient elected to withdraw before the first nivolumab dose and 1 patient died prior to SRS. Median baseline brain edema and total brain metastases volumes were 0.5cc (0-46.97cc) and 1.25 cc (0.1-3.46cc), respectively. To date, the median number of nivolumab cycles administered is 4.5 (1-15). Intracranial adverse effects were limited to apraxia and paresthesias in the patient who had the largest volume of peri-tumoral brain edema at baseline (46.97cc). Nivolumab was held and dexamethasone was given for 74 days at doses >1mg/day until neurological symptoms resolved. Systemic adverse events included one patient with grade 2 arthritis necessitating a 6-week treatment delay and 51 days of prednisone ≥10mg. At last follow-up, three patients had died of extracranial disease progression, including the two patients who did not receive protocol SRS. Among the three patients evaluable for intracranial response, there was one partial response and two stable diseases. All three patients had stable extracranial disease.

      8eea62084ca7e541d918e823422bd82e Conclusion

      Combining SRS and immunotherapy is safe in regards to acute toxicity with a manageable side effect profile. Close monitoring may be required for patients with significant baseline brain edema. Evaluation for efficacy awaits further follow-up and completion of recruitment in the phase 2 component of the trial.


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