This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Thorax And Mediastinum, Subject name: Surgery
Common location of thoracic pheochromocytoma:- 
Select and explain. 
A. Anterior mediastinum, B. Posterior mediastinum, C. Middle mediastinum, D. Superior mediastinum
B: Posterior mediastinum
Answer: B: Posterior mediastinum 
Explanation: "The posterior mediastinum is the usual site of intrathoracic pheochromocytoma. They have also rarely been repoed to occur in the middle mediastinum, with involvement of the left atrial wall or interatrial septum and aoic arch"