Pathology Klatskin tumor: (Repeat) A Primitive neuroectodermal tumor in chest B Cholangiocarcinoma arising from bifurcation of bile duct C Lung adenocarcinoma involving apical region D Enterochromaffin cell tumor 💡 Explanation Klatskin tumor: (Repeat) ✓ Correct Answer: B. Cholangiocarcinoma arising from bifurcation of bile duct