This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Pancreas, Subject name: Surgery
Pheochromocytomas if extra adrenal are most commonly located in 
Select and explain. 
A. Posterior mediastinum, B. Superior mediastinum, C. Anterior mediastinum, D. Middle mediastinum
A: Posterior mediastinum
Answer: A: Posterior mediastinum 
Explanation: Ans. (a) Posterior mediastinumRef: Bailey and love, 26th ed; pg. 869* Neurogenic tumors derived from the sympathetic nervous system or the peripheral nerves, more common in posterior mediastinum.* Mostly incidental findings in Chest radiograph* May be painful also* Includes neuroblastoma in childhood* Schwannomas and neurofibromas in adults, which are usually benign.* Pheochromocytoma arises from the sympathetic chain and produces the characteristic endocrine syndrome.* Excision of neurogenic tumors by thoracotomy, for smaller tumors a VATS approach done.