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
Most common tumor in the posterior mediastinum is: 
Select and explain. 
A. Neurofibroma, B. Teratoma, C. Lymphoma, D. Bronchogenic cyst
A: Neurofibroma
Answer: A: Neurofibroma 
Explanation: Most common tumors in the posterior mediastinum are Neurogenic tumors.
Schwannomas (neurilemmomas) and neurofibromas are the most common neurogenic tumors in adults.
Neurogenic tumors consist of tumors :


Originating from sympathetic ganglia : ganglioma, ganglioneuroblastoma and neuroblastoma.
Originating from intercostal nerves : Schwannoma (neurilemoma), neurofibroma & neurosarcoma.
Originating from paraganglia cells - paraganglioma