Toddler with refractory wheezing

CXR and CT of Castleman disease
CXR AP (above) shows massive bilateral hilar and mediastinal lymphadenopathy. Axial CT with oral contrast and without IV contrast of the chest and abdomen (below) better demonstrates the bilateral hilar and mediastinal lymphadenopathy (lower left) and shows bilateral retroperitoneal adenopathy anterior to the psoas muscles (lower right).

The diagnosis was Castleman disease.