摘要:In children and infants,neurogenic tumours are most commonly occurring mediastinal space occupying lesions,followed by foregut cysts,germ cell tumors,ly mphomas,ly mphangiomas and angiomas,tumors of the thymus,and pericardial cysts. Bronchogenic and other types of foregut cyst comprise 10-18% of all mediastinal masses identified in infants and children,20-32% of all mediastinal masses w hen all age group included. Approximately two thirds of mediastinal tumors and cysts are symptomatic in pediatric population. Foregut cysts of mediastinum are found most commonly in middle and posterior compartments but have been reported in anterior compartment. These cysts are usually found close to tracheobronch.