Osteochondroma of rib

Case contributed by Dr Domenico Nicoletti


Incidental finding.

Patient Data

Age: 70 years
Gender: Female

Rx chest supine

 Nodule of 1.5 cm rounded in the lower left lobe.


CT chest without contrast

Exostosis on posterior aspect of the left 4th rib, anteriorly, with intrathoracic bone growth. The central part of osteochondroma continue with the marrow cavity of the rib bone.

Case Discussion

Approximately half of all primary chest wall tumors are benign. The osteochondroma (exostosis) being the most common. Most often they are asymptomatic, but rarely are they associated with pneumothorax, hemothorax, diaphragmatic rupture, empyema and lung injury. Spontaneous pneumothorax is most commonly caused by the unprompted rupture of a pulmonary bleb or by the compressive action of osteochondroma on the lung parenchyma.

Case courtesy Dr.ssa Laura Braccaioli

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