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
Splenic vein thrombosis is best treated by - 
Select and explain. 
A. Splenectomy, B. Porto-caval shunt, C. Spleno-renal shunt, D. Mesenterico-caval shunt
A: Splenectomy
Answer: A: Splenectomy 
Explanation: • Portal hypertension due to isolated splenic vein thrombosis is known as left sided portal hypertension or sinistral hypertension.
• Pressure in portal vein and SMV are normal
• There is gastrosplenic venous hypertension leading to formation of gastric varices
Causes
• Pancreatitis (MC)  leading to splenic vein thrombosis
• Neoplasm, Trauma
Treatment
• Splenectomy is the treatment of choice