M9241 in Combination With Hepatic Artery Infusion Pump (HAIP) and Systemic Therapy for Subjects With Metastatic Colorectal Cancer or Intrahepatic Cholangiocarcinoma

Background:
One way to treat liver cancer is to deliver chemotherapy drugs only to the liver (and not to the whole body). Researchers want to see if adding the drug M9241 can improve the treatment. The drug triggers the immune system to fight cancer.
Objective:
To see if treatment with HAIPs to deliver liver-directed chemotherapy in combination with M9241 is effective for certain cancers.
Eligibility:
People aged 18 and older who have cancer of the bile ducts that is only in the liver, or colorectal cancer that has spread to the liver.
Design:
Participants will be screened with:
Medical history
Physical exam
Blood tests
Pregnancy test (if needed)
Tumor biopsy (if needed)
Electrocardiogram
Computed tomography (CT) scans
Participants will have an abdominal operation. A catheter will be placed into an artery that feeds blood to the liver. The catheter will then be attached to the HAIP. The HAIP will lay under the skin on the left side of the abdomen.
Participants will have chemotherapy drugs or heparin with saline infused into the HAIP every 2 weeks. M9241 will be injected under the skin every 4 weeks. They will get systemic chemotherapy through an IV or mediport every 2 weeks. They will receive this treatment until their cancer gets worse or they have bad side effects.
Participants will have 2 study visits each month. They will have CT scans every 8 weeks. At visits, they will repeat some screening tests.
Participants will have a follow-up visit 1 month after treatment ends. Then they will be contacted every 6 months for 5 years.