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Distal bile duct stricture caused by pancreatic head adenocarcinoma. (A) Endoscopic retrograde cholangiopancreatography shows a bile duct stricture. (B) Endoscopic ultrasonography-guided fine needle aspiration (EUS-FNA) of the pancreatic head mass (arrow indicates FNA needle). (C) Cytology of the EUS-FNA specimen (papanicolaou stain, ×400). Part C courtesy of Dr. Michael Henry, M.D.
