Michael P. D'Alessandro, M.D.
Peer Review Status: Internally Peer Reviewed
When discovered in an infant, it is most commonly benign.
Anterior mediastinal mass that does not change in size or configuration during inspiration and expiration, like a normal thymus does. May cause tracheal compression, unlike a normal thymus. May be difficult to distinguish from normal thymus in a young patient or lymphoma in an older patient. Characteristics to look for include calcification and fat within the lesion. More commonly cystic rather than solid.
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