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The article is about on the problems of diagnosis and surgical treatment of osteoid osteomas having various localization in children and adolescents. The results of the treatment of 5 patients (2 boys and 3 girls) aged 4-13 years with osteoid osteomas have been analyzed. In 2 cases, lesions were located in the tibia, in 1 case--femoral neck, in 1 case--ischium (fragment of the acetabulum), in 1 case--vertebra (half-arch). At the clinic, all patients underwent preoperative examination by osteoncologist; there was no disagreement as for the preoperative diagnosis and treatment strategy. In all cases, there was a monostotic lesion and all patients underwent scheduled operations. Scheduled surgery included resection of the "nest" and adjacent sclerotic areas, plastic repair of the post-resection defect was not required. In the case of the periarticular location, we replaced defect the bone defects with allogeneic "straw". This material is widely used in the treatment of bone diseases in children and adolescents: it is free of organic substances, has low immunogenicity, and can be used in the patients with positive allergic history; it is versatile, sterile, has high reparative regeneration activity, and does not require prolongation of postoperative antibiotic therapy or administration of antihistamines. In one patient, an autologous bone from the iliac wing was used. Steel structures have not been used. Microscopic description of preparations: among the reactively sclerosed trabeculae, having compact and coarsely glomerular structure, there is a "nest" consisting of poorly calcified small primitive and osteoid trabeculae, having different stages of cell differentiation with no signs of a typia. Pain relief occurred immediately after surgery, resection accuracy was confirmed by the control MSCT examination. Dynamic follow up time was 2 months to 7 years, recovery was achieved in 100% of cases. [ABSTRACT FROM AUTHOR]

The paper is aimed at reporting a retrospective analysis covering the period from 2007 to 2015. The study involved 22 patients with benign osteoclastoma (OC), 14 male and 8 female children aged 9 to 19. All patients had monostotic lesions with the following location of pathological foci: humerus--11 patients, femoral bone--7, shin bone-- 1, fibular bone--1, and ulnar bone--1. All 22 patients underwent surgery. Surgical treatment included resection of tumor focus within intact tissues (in cases of eccentric foci, bony bridge was preserved in the area of minimum damage, which was treated by electrocoagulation together with the cavity) together with bone grafting and intramedullary reinforcement of the affected bone (which provides stable osteosynthesis, early mobilization, and prevention of functional deficits in most patients). Consolidation was achieved in 100% of the operated patients. [ABSTRACT FROM AUTHOR]