[Pseudotumor processes in children ( according to material from the Filatov Children's Clinical Hospital)]

Pseudoneoplastic tumors are considered as a clinicoanatomic entity with a characteristic macro- and microscopic pattern, obscure etiology and genesis. The dissection data have demonstrated the forms of pseudoneoplastic processes. Observations of the most rare pseudotumors, such as "inflammatory" pseudotumor and tumor-like myositis ossificans are presented. "Inflammatory" pseudotumors are characterized by the involvement of the immune system cells, increased fibrillogenesis, and intensive osteogenesis in the lungs and the stomach. Cases of pseudoneoplastic myositis ossificans combined with tissue malformation are given particular attention.