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': 'Splenic vein thrombosis is best treated by - \nSelect and explain. \nA. Splenectomy, B. Porto-caval shunt, C. Spleno-renal shunt, D. Mesenterico-caval shunt', 'role': 'user'}, {'content': 'Answer: A \nExplanation: • Portal hypertension due to isolated splenic vein thrombosis\xa0is known as left sided portal hypertension or sinistral hypertension.\n• Pressure in portal vein and SMV are normal\n• There is gastrosplenic venous hypertension leading to formation of gastric varices\nCauses\n• Pancreatitis (MC) \xa0leading to splenic vein thrombosis\n• Neoplasm, Trauma\nTreatment\n• Splenectomy is the treatment of choice', 'role': 'assistant'}]