- For Part D dose confirmation: All participants must have histological evidence of cholangiocarcinoma and prescreened mutations, amplification, or gene/protein expression alterations related to Notch pathway. Participants must not have received >1 line of prior systemic therapy for metastatic or resectable disease (that is, participants may have received adjuvant gemcitabine and then later gemcitabine/cisplatin for recurrent metastatic disease).