Is ganglion 5 biopsy inefficient in a hilar cholangiocarcinoma diagnosis? A mini series of difficult inoperable cases. (September 2018) - Ginghina, O.; Iosifescu, R.; Spanu, A.; Omer, S.; Zamfir, M.; Baboi, D.; Mirica, R.; Stoica, A.; Iordache, N.