Rare case: osteochondroma of the sternum

An osteochondroma of the sternum is of clinical interest due to the rarity of its localization. This article presents a clinical case with dynamic observation of a patient with a sternal body mass. Computed tomography allowed evaluating the structural changes of the bone, topographic relationships with mediastinal organs, vessels of the anterior chest wall, and lack of response to radiation therapy in dynamics. Based on the obtained data, a preliminary diagnosis was made, which was further histologically confirmed. At present, the patient is preparing for surgical treatment.