Infantile hemangioendothelioma of the parotid and orbit


Hemangioendothelioma (or hemangioma) of the parotid gland:

  • It is considered the most common parotid gland tumor of childhood.
  • On ultrasonography (US); it is mostly seen as homogeneous mass replacing most of the parotid gland, with numerous large intratumoral vessels.
  • On MRI; it demonstrates uniform contrast enhancement apart from the flow voids.

Benign hemangioendothelioma (or capillary hemangioma) of the orbit:

  • It is the most common orbital vascular tumor in infants. It is an extraconal lesion.
  • On computed tomography (CT); it demonstrates intense homogeneous contrast uptake. CT is the preferred initial modality of imaging as it requires no sedation.
  • On US; it is compressible and hyperechoic.
  • On MRI; it is usually hypointense on T1 WI and iso- to hyperintense on T2 WI with intense contrast uptake. Features supporting diagnosis include lobules with thin septa, as well as intralesional and perilesional flow voids.