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: Pediatrics
Most common cause of mass in posterior mediastinum in children – 
Select and explain. 
A. Rhabdo sarcoma, B. Duplication cyst of oesphagus, C. Lymphoma, D. Neuroblastoma
D: Neuroblastoma
Answer: D: Neuroblastoma 
Explanation: "Most common posterior mediastinal masses in children are neurogenic tumors".
 Posterior mediastinal mass in children
1) Neurogenic tumors (Most common)                      
2) Foregut cyst (Second most common)
3)   Lymphoma (Third most common)                     
4) Germ cell tumors
5)   Lymphangiomas and agiomas

Mediastinal neurogenic tumors are
❑ Mediastinal neuroblastoma
❑ Ganglioneuroma                                                                                                          
❑ Ganglioneuroblastoma
❑ Schwannoma      
❑ Mediastinal pheochromocytoma