The present invention relates of an
ex vivo method for determining a reference
proteomic profile of extrahepatic cholangiocarcinoma in the presence of
bile duct stricture in a subject, comprising steps of : a) quantification of the
protein abundances of all proteins identified in at least one
bile duct cytological sample from at least one subject for which a diagnosis of extrahepatic cholangiocarcinoma has been previously established, or having benign stricture, b) quantification of the
protein abundances of all proteins identified in human
bile duct cells standard reference, c) determining the
proteomic profile of each of said at least one sample by comparing
protein abundances of each protein in the at least one sample with respect to the standard reference, d) determining a reference
proteomic profile for extrahepatic cholangiocarcinoma condition, by means of a statistical test established with the proteomic profiles determined in step c). The present invention also relates to a reference proteomic profile of extrahepatic cholangiocarcinoma in the presence of bile duct stricture, and to an
ex vivo method for
differential diagnosis of extrahepatic cholangiocarcinoma in the presence of bile duct stricture of a subject.