In adults clinically silent adrenal masses can be discovered incidenta
lly in imaging studies. Most of these 'incidentalomas' are benign, non
-functioning adenomas. In contradistinction, in infancy and childhood
the most common adrenal mass is the neuroblastoma, a malignant neural
crest tumour. Four children are described, each with a benign neural c
rest tumour - ganglioneuroma - incidentally discovered by conventional
radiography or sonographic examination. Complete surgical excision re
sulted in total recovery of all the children.