- This was the first study where BAY1163877 was given to humans. Impact of the study was to evaluate if patients with advanced solid cancers show advanced clinical benefit under the treatment with the pan FGFR inhibitor. Patients (all comers) received the study drug treatment in a dose-escalation scheme (no placebo group) to determine the safety, tolerability and maximum tolerated dose (MTD) of BAY1163877. The relative bioavailability of liquid service formulation and tablets was determined. - After the MTD was defined patients with solid tumors (all comers), lung cancer (lung adenocarcinoma & squamous non-small cell lung cancer), head and neck cancer or bladder cancer was enrolled according to their FGFR expression profile (biomarker stratification). - The study also assessed the pharmacokinetics, biomarker status, pharmacodynamic parameters and tumor response of BAY1163877. - BAY1163877 was given twice daily as oral application. Treatment was stopped if the tumor continued to grow, if side effects, which the patient cannot tolerate, occurred or if the patient decided to exit treatment.