RecruitingPhase 2Drug trialA Single-Arm Study of Pembrolizumab With Gemcitabine and Cisplatin as Perioperative Therapy for Potentially Resectable Intrahepatic CholangiocarcinomaTo find out if adding pembrolizumab to standard of care chemotherapy drugs (cisplatin and gemcitabine) will improve long-term response of intrahepatic cholangiocarcinoma after surgery, compared to treatment with surgery and standard chemotherapy alone.