This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Surgery
[{'content': 'Duodenal adenocarcinoma -a) Most common small bowel carcinomab) Periampullary carcinomac) Jaundice & anemia - most common symptomd) Local resection - curative \nSelect and explain. \nA. ac, B. bc, C. ad, D. b', 'role': 'user'}, {'content': 'Answer: A \nExplanation: • Duodenum is MC site of small intestinal adenocarcinoma\n• 15% in the proximal; 40% in the middle and 45% in the distal duodenum (MC)\n• Resectability and prognosis are better than other upper GI cancers.\nClinical Features\n• Most often presents as obstruction, with nausea, vomiting, and abdominal pain as the most frequent symptoms.\n• Anemia from bleeding and biliary or pancreatic obstructive symptoms can also be seen on initial presentation if the tumor is located within the periampullary region.\nDiagnosis\n• Endoscopy is the diagnostic test of choice for duodenal tumors, which allows for direct visualization and biopsy as needed.\nTreatment\n• For 1st or 2nd portion: Whipple procedure\n• For 3rd or 4th portion: Segmental duodenal resection', 'role': 'assistant'}]