title: Intraoperative upper gastrointestinal endoscopy and biopsy.
mesh_terms: D002288:Adenocarcinoma, Mucinous / Q000175:diagnosis* / Q000473:pathology; D000368:Aged; D001706:Biopsy; D003949:Diagnostic Techniques, Surgical; D004379:Duodenal Neoplasms / Q000175:diagnosis*; D004386:Duodenum; D004724:Endoscopy; D004945:Esophagoscopy; D005336:Fiber Optic Technology; D005773:Gastroscopy; D006801:Humans; D008297:Male; D008722:Methods; D010190:Pancreatic Neoplasms / Q000175:diagnosis