Thoracic computed tomography (CT) scan. (a) Osteochondroma developed on the internal face of left ribs, anterior arch, with mass effect on anterior mediastinum, which is associated with rib cage deformation (axial section, bone window). (b) Osteochondroma developed on the internal face of left ribs, anterior arch (sagittal section, bone window). (c) Osteochondroma developed on the internal face of left ribs, lateral arch (coronal section, bone window). (d) Osteochondroma developed on the anterior arch of left ribs, with preaortic expansion in the retrosternal space and ascending aorta compression.

Thoracic computed tomography (CT) scan. (a) Osteochondroma developed on the internal face of left ribs, anterior arch, with mass effect on anterior mediastinum, which is associated with rib cage deformation (axial section, bone window). (b) Osteochondroma developed on the internal face of left ribs, anterior arch (sagittal section, bone window). (c) Osteochondroma developed on the internal face of left ribs, lateral arch (coronal section, bone window). (d) Osteochondroma developed on the anterior arch of left ribs, with preaortic expansion in the retrosternal space and ascending aorta compression.

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Costal osteocartilaginous exostoses, also known as osteochondromas, are the most common neoplasms of the long bones but are rare tumors of the ribs. Osteochondroma is often asymptomatic and incidentally observed. Tumors typically begin to grow before puberty and continue until bone maturation is reached. Our paper presents the case of a 16-year-old...

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Full-text available
Costal osteocartilaginous exostoses, also known as osteochondromas, are the most common neoplasms of the long bones but are rare tumors of the ribs. Osteochondroma is often asymptomatic and incidentally observed. Tumors typically begin to grow before puberty and continue until bone maturation is reached. Our paper presents the case of a 16-year-old...