CTICasesGanglioneuroma (Posterior Mediastinal)
Imaging findings
A young patient (16-17 years old) presented with a unilateral, posterior mediastinal mass, seen as an opacity overlying the heart on chest radiograph, demonstrating an incomplete hilum overlay sign consistent with an extrapleural or broad-based pleural abutting lesion. On CT, the mass was elongated and showed fairly uniform low attenuation. MRI confirmed fluid elements within the mass and avid enhancement after contrast administration, suggesting an origin from the sympathetic chain.
Key takeaways
Ganglioneuromas are benign nerve sheath tumors typically found in young patients and commonly arise from the sympathetic chain in the posterior mediastinum. Their characteristic imaging features include an elongated morphology, relatively low attenuation, and avid enhancement, often presenting with an incomplete hilum overlay sign.
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