간문부 담관암은 조기 진단이 매우 어려운 질환으로 절제가 가능한 경우 완치도 기대해 볼 수 있지만, 대부분의 경우 진행된 상태에서 확진되므로 예후가 매우 불량하다. 영상학적 검사및 조직병리학적 검사에서 양성으로 판명되더라도 악성이 강하게 의심될 경우 진단을 위한 보다 적극적인 노력이 필요할것으로 생각된다. 저자들은 양성 담관협착으로 진단 3개월 후추적검사에서 진행된 간문부 담관암으로 확진된 1예를 보고하는 바이다.

Klatskin tumors are difficult to diagnosis in the early stages. Therefore early detection is important for curative treatment and prognosis of these tumors. We report a case of a 70-year-old female who was diagnosed with a benign stricture of the common bile duct during a routine health examination at an outside hospital. She underwent dilation of the stricture but of follow up examination the stricture worsened and she was referred to our center. On admission no malignance was suspected on initial abdominal ultrasound, CT, MRCP, ERCP and brush cytology. On follow up CT and MRI at our center, Klatskin tumor was suspected and adenocarcinoma was confirmed on ERCP and IDUS with brush cytology and forcep biopsy. Even if malignancy is not suspected on radiologic and histologic examination it is prudent to perform close follow up of benign biliary strictures.