stage 0 perihilar bile duct cancer

Definition of stage 0 perihilar bile duct carcinoma in situ
National Cancer Institute

stage 0 perihilar bile duct carcinoma in situ

(... PAYR-ee-HY-ler bile dukt KAR-sih-NOH-muh in SY-too)
Abnormal cells are found in the innermost layer of tissue lining the perihilar bile duct. These abnormal cells may become cancer and spread into nearby normal tissue. Stage 0 is also called high-grade dysplasia.

Source: NCI Dictionary of Cancer Terms