This phase 1, multicenter, open-label, dose-escalation study enrolled pts with advanced solid tumors who had exhausted all available standard treatments...One cholangiocarcinoma pt with FGFR alteration (FGFR2(17)-ARHGAP24(3) fusion) treated at 80 mg achieved partial response...This first-in-human study of TT-00434 showed a manageable and well-tolerated safety profile. The preliminary antitumor activity was observed in pt with FGFR2 altered cholangiocarcinoma.