Overview Phase I/II Trial of Antagonism of HER in GI Cancer Status: Completed Trial end date: 2019-08-02 Target enrollment: Participant gender: Summary Recruitment to phase I of the PANTHER trial is complete. Phase II, is to evaluate the best overall response rate for AZD8931 + FOLFIRI treatment. Phase: Phase 2 Details Lead Sponsor: University College, LondonCollaborators: AstraZenecaCancer Research UKNational Institute for Health Research, United KingdomTreatments: FluorouracilFolic AcidIrinotecanLeucovorinLevoleucovorin