CTICasesEctopic Thymoma
Imaging findings
CT chest shows an incidental, hypervascular, and shaggy subcarinal posterior mediastinal mass causing focal contour deformity of the adjacent airways, discovered incidentally on a trauma scan in an 18-year-old patient.
Key takeaways
Thymomas are the most common primary anterior mediastinal tumors. However, they can rarely arise in ectopic locations (such as the middle or posterior mediastinum or neck) due to aberrant embryological migration of thymic tissue. Surgical resection is recommended to rule out malignancy and prevent local invasion.
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