Background
First-line standard-of-care therapy for advanced cholangiocarcinoma is gemcitabine plus cisplatin; there is no established second-line systemic therapy. Fibroblast growth factor receptor
(FGFR)-2
fusions/rearrangements can be oncogenic drivers, occurring almost exclusively in intrahepatic cholangiocarcinoma, but little is known about whether
FGFR2
status affects the response to systemic chemotherapy.
Objective
We aimed to evaluate the effects of
FGFR2
status on survival outcomes in patients receiving systemic therapy for intrahepatic cholangiocarcinoma.
Methods
In this retrospective analysis, patients treated with systemic therapy at Memorial Sloan Kettering Cancer Center for intrahepatic cholangiocarcinoma were categorized into three cohorts:
FGFR2
fusions; other
FGFR2
alterations; no
FGFR2
alterations. Endpoints were overall survival and progression-free survival per therapy line.
Results
In total, 132 patients with intrahepatic cholangiocarcinoma were included (
FGFR2
fusions,
n
= 15; other
FGFR2
alterations,
n
= 2 [data not reported]; no
FGFR2
alterations,
n
= 115). First-line therapy was platinum based in 93% of patients; 80% received platinum/pyrimidine-based second-line therapy. For patients with
FGFR2
fusions and no
FGFR2
alterations, respectively, median overall survival from diagnosis was 31.3 months (95% confidence interval [CI] 5.8–not estimable months) [
n
= 9] and 21.7 months (95% CI 16.1–26.6) [
n
= 109]; median progression-free survival in first-line therapy was 6.2 months (95% CI 2.0–16.8) [
n
= 15] and 7.2 months (95% CI 5.0–8.3) [
n
= 107], and median progression-free survival in second-line therapy was 5.6 months (95% CI 2.8–10.3) [
n
= 8] and 3.7 months (95% CI 2.6–5.6) [
n
= 81].
Conclusions
Patients with intrahepatic cholangiocarcinoma and
FGFR2
fusions may have a better prognosis than those without
FGFR2
alterations in terms of overall survival, and progression-free survival on second-line, but not first-line systemic therapy. Progression-free survival improvement on second-line chemotherapy may imply an important impact of prior chemotherapy as first line.