Molecular profiling and treatment pattern differences between intrahepatic and extrahepatic cholangiocarcinoma

Area of Science:

• Oncology
• Gastroenterology
• Medical Research

Background:

• Intrahepatic cholangiocarcinoma (ICC) and extrahepatic cholangiocarcinoma (ECC) exhibit distinct treatment patterns.
• Limited comparative studies exist on molecular profiling and treatment disparities between ICC and ECC.

Purpose of the Study:

• To compare molecular profiling rates and treatment strategies for ICC and ECC.
• To investigate the utilization of adjuvant, liver-directed, targeted, and investigational therapies in ICC and ECC.

Main Methods:

• Multicenter retrospective study involving 847 patients with ICC or ECC.
• Data collected on risk factors, pathology, treatments, and survival outcomes.
• Comparative statistical analyses were performed.

Main Results:

• ECC patients were more likely to have early-stage disease, undergo resection, and receive adjuvant chemoradiation.
• ICC patients had higher rates of molecular profiling, liver-directed therapy, targeted therapy, and clinical trial enrollment.
• Advanced ECC patients had shorter median overall survival compared to advanced ICC patients.

Conclusions:

• Advanced ECC patients demonstrate low molecular profiling rates, potentially due to insufficient tissue, and limited use of targeted therapies and clinical trials.
• Despite higher rates in ICC, both cholangiocarcinoma subtypes have poor prognoses.
• There is a critical need for improved targeted therapies and expanded access to clinical trials for cholangiocarcinoma.