Contemporary overview of liver transplantation for intrahepatic cholangiocarcinoma and combined hepatocellular-cholangiocarcinoma.

Historically, intrahepatic cholangiocarcinoma (iCCA) and combined hepatocellular-cholangiocarcinoma (cHCC-CCA) were regarded as absolute contraindications for liver transplantation (LT) due to dismal outcomes characterized by high recurrence rates and poor long-term survival in early experiences. Consequently, these malignancies have been systematically excluded from standard transplant criteria for decades. However, the landscape of transplant oncology is undergoing a significant paradigm shift, driven by a deeper understanding of tumor biology and refined patient selection strategies. Recent multicenter retrospective studies have identified a distinct subgroup of patients-specifically those with "very early" iCCA in the setting of cirrhosis-who achieve excellent post-transplant outcomes comparable to those of hepatocellular carcinoma. This evidence has prompted major international societies to update their guidelines, cautiously opening the door for LT in this selected population. Conversely, cHCC-CCA remains a diagnostic and therapeutic challenge. This narrative review critically analyzes the pivotal data driving the current paradigm shift and synthesizes the latest clinical practice guidelines to provide a contemporary roadmap for the management of iCCA and cHCC-CCA in the transplant setting.