<prompt> Most common cause of mass in posterior mediastinum in childrenRhabdo sarcomaDuplication cyst of oesphagusLymphomaNeuroblastoma  <response>: Most common posterior mediastinal masses in children are neurogenic tumors. Posterior mediastinal mass in children1 Neurogenic tumors Most common 2 Foregut cyst Second most common3 Lymphoma Third most common 4 Germ cell tumors5 Lymphangiomas and agiomasMediastinal neurogenic tumors are Mediastinal neuroblastoma Ganglioneuroma Ganglioneuroblastoma Schwannoma Mediastinal pheochromocytoma 