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Extrahepaticcholangiocarcinoma (EHCC)isamalignanttumorarisingfrombileductepithelium .Unlikemosthumancancers ,atissuediagnosisofcholangiocarcinomaisoftenextremelydifficultbe causeoftumorlocation ,size ,anddesmoplasticcharacteristics .Percutaneousfineneedleaspirationisfrequentlynotpossiblebecausemanyofthesetu morsarelocatedintheliverhilumamidlargevascu larstructure .Furthermore ,tumormassesareoftennotevenidentifiablebyCT ,ultrasound ,ormag neticresonanceimaging .Endoscopicapproachesarealsoofl… 相似文献
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