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New approaches in rare thoracic tumors (ID 60)
- Event: ELCC 2018
- Type: Proffered Paper session
- Presentations: 1
112O - Primary result of an investigator-initiated phase II trial of nivolumab for unresectable or recurrent thymic carcinoma: PRIMER study (NCCH1505) (ID 349)
11:00 - 12:30 | Author(s): H. Horinouchi
Thymic carcinoma (TC) is a rare cancer with a poor prognosis. Treatment options are limited, especially after relapse. We previously reported that PD-L1 positivity was observed in 70% of TCs by immunohistochemistry suggesting anti PD-1/PD-L1 agents could be a promising treatment.
In this open-label, two-stage, multi-center, single-arm, phase II trial, the main eligibility criteria were: unresectable or recurrent TC, an ECOG-PS of 0 or 1, the presence of measurable disease, progression after at least one previous platinum-based chemo(radio)therapy treatment, and no history of autoimmune disease. Nivolumab was administered at a dose of 3 mg/kg every 2 weeks. The primary endpoint was the response rate (RR) as evaluated by central review using the RECIST v1.1; secondary endpoints include progression-free survival (PFS), overall survival, disease control rate, and safety. The planned sample size was 15 for the first stage and 15 for the second stage, with a threshold RR of 5%, an expected RR of 20%, one-sided alpha of 5% and power of 80%. This trial was registered with UMIN000022007.
Between July 1 and August 16, 2016, 15 patients were accrued in the first stage; at the data cutoff (August 31, 2017), all were assessable for a response. Median follow-up time was 3.8 months (range 1.4–12.0). All were Japanese, 12 were male, median age was 55 (range 34–70), 13 had squamous histology. The median number of nivolumab cycles received was 8 (range 3–29). RR by central review was 0% (no patient with complete or partial response; 95% confidence interval [CI]: 0–21.8). Eleven patients had stable disease and four had progressive disease. Median PFS was 3.8 months (95% CI: 1.9–5.6), and 12-month PFS rate was 13.3% (95% CI: 2.2–34.6). Two patients experienced a treatment-related serious adverse events (grade 3 AST increase and grade 2 adrenal insufficiency). Because the early termination criteria at the first stage (less than one responder) was fulfilled, the patient accrual was terminated.
Despite of the small number of patients, our results suggested further development of nivolumab is not recommended in previously treated unresectable or recurrent TC.
Clinical trial identification:
Legal entity responsible for the study:
Japan Agency for Medical Research and Development
T. Seto: Consulting and advisory services, speaking or writing engagements, public presentations; AstraZeneca, Bristol-Myers Squibb, Chugai, Eli Lilly, MSD, Nippon Boehringer Ingelheim, Ono, Pfizer, Taiho, Takeda. Direct research support to the responsible project lead (e.g., Principal Investigator); Eisai, MSD, Nippon Boehringer Ingelheim, AstraZeneca, Astellas, Chugai, Daiichi Sankyo, Eli Lilly, Merck Serono, Novartis, Pfizer. H. Horinouchi: Research Grant; Ono pharmaceutical, BMS, MSD, Taiho, Chugai, Novartis, Astellas, Merck Serono. Honoraria; Ono pharmaceutical, BMS, Taiho, Chugai, Novartis, Lilly, AstraZeneca. S. Umemura: Corporate-sponsored research; MSD, AstraZeneca. Honoraria; AstraZeneca, Chugai pharmaceutical, Ono, Boehringer ingelheim. Y. Hosomi: Honoraria; Lilly, Ono pharmaceutical, BMS, Chugai, AstraZeneca. Corporate-sponsored research; Lilly, Ono pharmaceutical, Chugai, AstraZeneca, Taiho, MSD. M. Satouchi: Corporate-sponsored research; Astellas Pharma, AstraZeneca, Boehringer Ingelheim, Bristol-Myers Squibb, Chugai Pharmaceutical, Eli Lilly Japan, Novartis, Ono Pharmaceutical, Pfizer Japan. Lecture fees and/or honoraria; AstraZeneca, Boehringer Ingelheim, Bristol-Myers Squibb, Chugai Pharmaceutical, Eli Lilly Japan, Merck, Novartis, Ono Pharmaceutical, Pfizer Japan, Taiho Pharmaceutical. Y. Ohe: Corporate-sponsored research; Taiho, AstraZeneca, Chugai, Lilly, Pfizer, MSD, Novartis, Kyorin, Dainippon-Sumitomo, Ignyta. Membership on an advisory board or board of directors or other substantive relationships; Taiho, AstraZeneca, Chugai, Lilly, Pfizer, MSD, Novartis, Daiichi-Sankyo, Nipponkayaku, Boehringer Ingelheim, Bayer. All other authors have declared no conflicts of interest.
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