Fig. 14From: Imaging features and differential diagnoses of non-neoplastic diffuse mediastinal diseasesThymoma. Two cases of diffuse infiltration of the mediastinum from different causes. The first is related to a fibrosing mediastinitis (a), while the other corresponds to a recurrence of a histologically proven thymoma stage IVA (b), highly metabolic on PET/CT (c). Neither disorder can be differentiated morphologicallyBack to article page