The reason for the publication of this article was the increase in the number of children with long-standing organic foreign bodies in the respiratory tract, the late diagnosis of which causes severe complications. The article presents the three most significant cases from the general series, when the diagnosis and treatment tactics at the stages of treatment were associated with errors both at the prehospital stage and in the hospital. In the first clinical case, as it turned out, the child had aspired multiple foreign bodies. The first bronchoscopy revealed one solid foreign body. Due to severe fibrinous-purulent endobronchitis and contact bleeding, the bronchoscopy procedure was aborted. However, after 10 days, the child independently coughed up the second seed, which was a surprise to us. Control bronchoscopy after 3 weeks revealed no foreign bodies. In the second clinical observation, a child developed bronchiectasis due to a long stay of a foreign body in the respiratory tract. The third case demonstrates the diagnosis and treatment tactics in a child with a foreign body against the background of a coronavirus infection. In the first and third cases, the results of treatment were satisfactory. In the second case, a long stay of peanuts in the respiratory tract led to bronchiectasis in the lower lobe of the left lung, which required its removal. In the follow-up, there are no complaints, the child grows and develops according to age. The study analyzes the mistakes made at the stages of diagnosis and treatment of children with foreign bodies in the respiratory tract.Conclusion. Young children with long-term and atypically current respiratory diseases, dubious and even normal radiological picture with the absence of comprehensive information on the anamnesis of diseases should alert the doctor to the possibility of aspiration of a foreign body in the respiratory tract and serve as the basis for performing bronchoscopy.

Introduction. The paper provides a review of domestic and foreign literature on photodynamic therapy, which is mainly used by oncologists in the treatment of adult patients and is little known to pediatric surgeons. The aim of this work is to describe the history of the formation, principles and mechanisms of photodynamic therapy, the main groups of photo sensitizers, areas of clinical application and prospects for wider use in pediatric surgery. Material and methods. Literature sources were searched in the databases in Russian eLIBRARY.RU and English Medline and PubMed. The following keywords were specified for the search: photodynamic therapy, dysplasia, metaplasia, angiodysplasia, Barrett's syndrome, children. 865 papers were found, of which 66 were fully consistent with the purpose of our study and were analyzed. Results. The data presented in the review of the literature indicate the high efficiency of the method of photodynamic therapy in the treatment of a number of diseases, mostly in oncology. In addition, the work contains theoretical calculations and separate reports on the effectiveness of the method in the treatment of dysplasia of varying degrees in children. Discussion. Taking into account the minimally invasiveness of the technique, the relative cheapness of photosensitizers and equipment for generating laser radiation, it is possible to create a basis for conducting research on the treatment of children with various dysplasias, epithelial metaplasia, and vascular malformations. Another promising direction is the development of technologies for the use of photodynamic methods for the treatment of severe forms of pyoinflammatory diseases in children. Conclusion. In childhood surgery, there are nosological forms of diseases where the method of photodynamic therapy has the prospect of effective use. Limitations on the scope of this article do not allow for a detailed analysis of the existing experience in the use of photodynamic therapy in children, which will need to be done in subsequent works.