Fig. 3

A 44-year-old man who presented with hyaline vascular type Castleman disease. a, c Contrast-enhanced CT images of the neck show multiple nodules (black *) with marked enhancement patterns. b Dilated and tortuous vessels are observable around the nodules. c An intra-nodular cystic region is also observable (black arrow). d Spectral Doppler ultrasound imaging shows plentiful blood flow