[04.09.2023] Updated content, AnKing Overhaul for Step 1 & 2/AnKingMed, ID 309603

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it is classicly this place, added to extra, couldn’t find anything about duodenum however

It is noted in same section of amboss that tit can cause an cholechonteric fistula which causes gallstone ileus with quotations below. Also see UWORLD 2903 regarding the same and image.

“Cholecystoenteric/choledochoenteric fistula (biliary-enteric fistula): an abnormal communication between the gallbladder or the CBD with the adjacent bowel
Gallstone ileus: due to biliary-enteric fistula”