CTICasesOsteochondroma of the Vertebral Transverse Process
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Imaging findings
Chest radiographs show a large, heavily calcified mass in the left upper thorax that is difficult to appreciate on the lateral view. Chest CT demonstrates that this lesion is a benign-appearing osseous growth arising from and continuous with the left transverse process of a thoracic vertebra, consistent with an osteochondroma.
Key takeaways
Osteochondromas are common benign bone tumors that occasionally arise from the spine or ribs. On chest radiographs, they can project over the lung parenchyma and mimic calcified lymph nodes or pulmonary masses; however, CT easily clarifies their musculoskeletal origin by demonstrating direct bony continuity with the parent bone.
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