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': 'All the following indicates early gastric cancer except \nSelect and explain. \nA. Involvement of mucosa, B. Involvement of mucosa and submucosa, C. Involvement of mucosa, submucosa and muscularis, D. Involvement of mucosa, submucosa and adjacent lymph nodes', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Early gastric cancer is defined as adenocarcinoma limited to the mucosa and sub mucosa of the stomach, regardless of the lymphonode status.\nApproximately 10% of patients with early gastric cancer are found to have lymph node metastasis on presentation.\nThe overall cure rate with adequate gastric resection and lymphadenectomy is —95%.\nIt has the best prognosis among stomach cancer subtypes.', 'role': 'assistant'}]