CTICasesPleural Schwannoma
Imaging findings
Chest CT demonstrates a well-circumscribed, lobulated mass in the left posterior intercostal space abutting the pleura. The mass shows low attenuation on CT, with a mean attenuation value of approximately 10 Hounsfield units, suggesting cystic or myxoid changes. Remodeling of the adjacent rib is present. Biopsy confirms a benign schwannoma.
Key takeaways
Schwannomas are benign nerve sheath tumors that commonly arise from intercostal nerves in the posterior mediastinum. On CT, they present as well-circumscribed paraspinal or pleural-based masses, often exhibiting low attenuation due to myxoid degeneration or cystic changes. They must be differentiated from malignant pleural tumors like solitary fibrous tumors of the pleura.
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