Which of these is the most common cause of a posterior mediastinum mass in children?: (A) Rhabdomyoma, (B) Duplicated cyst of the esophagus, (C) Thymoma, (D) Neuroblastoma
Answer is D. Ans. D. NeuroblastomaSeveral causes of posterior mediastinum mass in children are known; including neurogenic tumors (most common cause), foregut cyst, germ cell tumors, lymphangiomas and lymphomas. Since the most common neurogenic tumor in children is neuroblastoma, it should be the correct answer.