[Tumors and cystic formations in the chest cavity of children].

During 13 years 91 children with sizable formations of the lungs and mediastinum aged from 3 months up to 15 years were treated in the clinic. The rationally selected volume of clinical examinations facilitated differential diagnosis in the preoperative period and excluded diseases simulating sizable processes (intrathoracic dystopia of the kidney, malformations of the vessels etc.). An incomplete examination of such patients might result in diagnostic errors followed by unjustified operative interventions.