OSTEOBLASTOCLASTOMA OF THE ACROMIAL END OF THE CLAVICLE

The aim of the work: to familiarize surgical doctors with the atypical localization of osteoblastoclastoma (OBC) in a child who simulated an aneurysmal bone cyst for the purpose of early diagnosis and treatment of this rare disease. Materials and Methods. The survey was carried out on the basis of the municipal non-profit enterprise "Ternopil Regional Children's Clinical Hospital" of the Ternopil Regional Council. The patient's outpatient and inpatient documentation has been carefully studied. X-ray examination is standard equipment. Magnetic resonance imaging – Hitachi AIRIS Mate Open-Bore 0.2 MRI device. Histological examination – staining with hematoxylin-eosin, eyepiece x300. We did not find data on clavicle OBC in the available literature, so we consider it necessary to share our clinical observation. Results. A rare case of osteoblastoclastoma of the acromial end of the right clavicle was described in a patient aged 11 years. X-ray and clinical symptoms were more characteristic of an aneurysmal bone cyst. Histological examination of the removed tumor showed numerous foci of bone destruction with a large number of large spindle-shaped, multinucleated cells, which is characteristic of the lytic stage of osteoblastoclastoma. Five months after the operation, no functional disorders were detected in the patient, the X-ray clearly shows bone regeneration at the site of segmental resection of the clavicle. Conclusions. Osteoblastoclastoma of the clavicle in childhood is very rare. Clinical and radiological symptoms are not always reliable, the final diagnosis is possible after histological examination. A radical method of treating this disease is surgery. The high ability to regenerate bone tissue in children allows for oxidative resections over a considerable length.