system
Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
Most common cause of upper GI bleed is
assistant
The correct answer is  Most common cause of upper GI bleed is duodenal ulcer-33%. Other causes are gastric ulcer-21%, erosions-26%, mallery weis tears-4%, oesophageal varices-4%, tumours-0.5%, vascular lesions eg. Dieulafoy's disease-0.5% and others-5%. Reference : page 1063 Bailey and Love's sho practice of surgery 25th edition