A study to determine whether the number and types of bacteria in the gut affects how well treatment works for bile duct cancer (ABC-12)

This study is looking at whether the number and types of bacteria that live naturally in our bowel affects how well the treatment for biliary cancer works.

It is for people with bile duct cancer that:

• cannot be removed by surgery and you haven’t had any treatment for it

• when you were first diagnosed the cancer had spread to another part of the body

• has come back at least 6 months after treatment with the aim to cure

It is also open to people with gallbladder cancer that has spread or come back least 6 months after treatment with the aim to cure.