Introduction
Obstructive jaundice caused by malignant tumor is commonly encountered in daily practice in the gastrointestinal field. Hepato-biliary-pancreatic cancers, such as liver cancer, cholangiocarcinoma, or pancreatic cancer, are among the most common causes of obstructive jaundice, whereas bile duct metastasis of breast cancer is extremely rare. Herein, we present our experience of a case of obstructive jaundice caused by bile duct metastasis of breast cancer, in which various endoscopic drainage procedures were performed. We believe that this is a valuable case due to the rarity of this presentation, and have therefore reported it with a discussion of the literature.