Science and Innovations in MedicineScience and Innovations in Medicine2500-13882618-754XFSBEI of Higher Education SamSMU of Ministry of Health of the Russian Federation2146210.35693/2500-1388-2018-0-2-60-65Research ArticleMorphological Features of the Inflammatory Myofibroblastic TumorYunusovaYuR RPhD, associate professor of the Department of general and clinical pathology: pathological anatomy, pathological physiology, SamSMU.julja_junusova@rambler.ruFedorinaTA APhD, professor of the Department of general and clinical pathology: pathological anatomy, pathological physiology, SamSMU.fedorina_ta@list.ruRozumnyDV VSenior Lecturer of the Department of general and clinical pathology: pathological anatomy, pathological physiology, SamSMU.dvrozumny@list.ruShaminAV Vhead of the Department of Oncology, Hematology and Chemotherapy of the Samara City Children's Clinical Hospital №1 n.a. Ivanova NN.detonco63@mail.ruSamara State Medical UniversitySamara City Children's Clinical Hospital №1 n.a. Ivanova NN1506201832606510032020Copyright © 2018, Yunusova Y.R., Fedorina T.A., Rozumny D.V., Shamin A.V.2018Introduction. Inflammatory myofibroblastic tumor (IMT) is a rare form of children neoplasm, characterized by intermediate biological behavior. In case of this, pathological diagnostics and valid tumor prognosis are difficult to perform; practitioners are not familiar enough with this pathology. Aim - to get an idea of the tumor morphological features, approaches to differential diagnosis of IMT, spreading in pediatric oncopathology, based on a review of modern literature. Material and methods. The retrospective analysis of soft tissue tumors in children operated for the period from 2007 to 2017 in Samara City Children's Clinical Hospital №1 n.a. Ivanova N.N. was performed. Among 1344 tumors, 5 cases verified as were detected IMT Results. Own clinical observations with children’s sex and age, tumor localization and speed of development, results of surgical treatment, tumor description in gross and in histological specimens, results of additional methods used in differential diagnostics from sarcomas are presented. Conclusions. Taking into account the tendency of tumor recurrence, the conclusion of the importance of morphological study of margins of tumor resection is made.rare tumors in childreninflammatory myofibroblastic tumorpseudotumorредкие опухоли у детейвоспалительная миофибробластическая опухольпсевдоопухоль[Попко А.С., Локшин К.Л., Шестакова Л.А., Ширшов В.Н. Воспалительная миофибробластическая опухоль мочевого пузыря. Вестник урологии. 2017;5(4):79-83][Santos Lopes S, Furtado A, Oliveira R et al. Inflammatory Myofibroblastic Tumor of the Bladder: 2 Rare Cases Managed with Laparoscopic Partial Cystectomia. CaseRepUrol. 2016:4976150. doi: 10.1155/2016/4976150][Etani T, Naiki T, Nagai T et al. 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