Immunoglobulin G4 Cholangiopathy Masquerading as a Klatskin Tumor: An Interesting Case

A Typical Case of an Atypical Disease: Klatskin Tumor

Cholangiocarcinoma is a rare type of cancer disorder. The case report is of a 55-years-old male patient who came to the output patient department (OPD) with complaints of abdominal pain and weight loss for 15 days and later was diagnosed with Klatskin tumor after mandatory investigations. After the approval of the tumor board committee, he is under chemotherapy, to which he is responding positively. Klatskin tumor is a type of cholangiocarcinoma occurring at the convergence of the right and left lobes of hepatic bile ducts, forming the common bile duct. The source of cholangiocarcinoma is idiopathic, and most cholangiocarcinoma is treated with the help of either surgical resection or chemotherapy. Surgical resection is performed in initial cases, but most patients present with the advanced stage of Klatskin tumor. CA-19-9 is a tumor marker that indicates the presence of a Klatskin tumor.