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A case with type IV Klatskin tumor. A: The plain CT reveals that the tumor is in the portal hepatic region with dilatation of the left and right hepatic ducts; B: The patient underwent RFA under CT guidance after internal and external drainage for 2 wk; C: The plain CT scan reveals a liquidized and necrotic region of the tumor in the portal hepatic region without contrast enhancement 2 mo after RFA.
