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Well-circumscribed, solid, non enhancing, mediastinal mass, iso to hypoattenuating to muscle.
Pathologically proven ganglioneuroma.
Ganglioneuromas are fully differentiated neuronal tumors that do not contain immature elements. They tend to occur in the pediatric population and are often asymptomatic. Usually, patients are older than 10 years old, compared to neuroblastoma which occurs in patient younger than 3 years old.