Pemigatinib for Unresectable or Metastatic Cholangiocarcinoma With Fibroblast Growth Factor Receptor-2 Rearrangement: Results From the Phase III FIGHT-302 Trial.

PURPOSE: Cholangiocarcinoma is a rare cancer associated with poor prognosis. Pemigatinib was the first FGFR1-3 inhibitor approved for second-line therapy and beyond, on the basis of the phase II FIGHT-202 trial. Here, we assess efficacy and safety of first-line pemigatinib.

METHODS

FIGHT-302 is a phase III, randomized, global trial evaluating pemigatinib as first-line therapy (ClinicalTrials.gov identifier: NCT03656536). Adults with advanced cholangiocarcinoma with FGFR2 rearrangement were randomized 1:1 to receive pemigatinib (13.5 mg once daily) or chemotherapy (1,000 mg/m2 gemcitabine plus 25 mg/m2 cisplatin once per day on days 1 and 8 of every 3-week cycle for ≤8 cycles) and were stratified by prior receipt of chemotherapy, geographic region, and tumor burden. Pemigatinib crossover was allowed for patients progressing on chemotherapy. The primary end point was progression-free survival (PFS). Secondary efficacy, safety, and exploratory end points were also analyzed.

RESULTS

Overall, 4,563 patients were prescreened, 196 were screened, and 167 randomly assigned to receive pemigatinib (n = 83) or chemotherapy (n = 84) before early closure of the study because of a change in standard of care. The median PFS was 8.3 months in the pemigatinib group versus 6.8 months in the chemotherapy group (hazard ratio, 0.58 [95% CI, 0.39 to 0.87]; nominal P = .0078); objective response rate was 47% versus 15%, and the median duration of response was 14.2 versus 6.3 months. Median overall survival was similar (24.4 v 25.0 months, respectively). In the crossover group (n = 42, second-line pemigatinib), the median PFS was 8.1 months. Safety was consistent with the known profile of pemigatinib.

CONCLUSION

To our knowledge, this was the largest, first-line, randomized, phase III trial of a targeted therapy for advanced FGFR2-rearranged cholangiocarcinoma. Pemigatinib demonstrated prolonged median PFS compared with chemotherapy, with no new safety findings.