Late-onset cystic hygromas: the role of CT.

Cystic hygromas usually present in the first two years of life. We report a retrospective study of nine patients who first presented with neck and mediastinal masses after two years of age. The clinical evaluation of size, margins, and presence of respiratory symptoms can be used to select those requiring preoperative computed tomography. The five patients who had this examination all demonstrated mediastinal or axillary involvement. Patients …