|
FIG 2. Three-month-old female patient with right parotid hemangioendothelioma.
A, Power Doppler imaging shows numerous large intratumoral vessels, demonstrated to be branches of the external carotid artery and tributaries of the retromandibular vein.
B, Three-dimensional power Doppler imaging confirms the extreme vascularity of the parotid mass.
C, Fat-suppressed T2-weighted transverse image shows a hyperintense mass (small solid arrows) with numerous intratumoral vessels. Extension into the deep lobe (open arrow) is well shown. Long arrows identify the external carotid artery (medial) and retromandibular vein (lateral).
D, Contrast-enhanced T1-weighted transverse image shows enhancement of the solid portion of the mass, which involves the entire deep lobe (large arrowhead), and contains numerous large vessels (small arrowheads). The masseter (m) and medial pterygoid (p) are not involved.
E, Dynamic image from 99mTc-labelled red cell scintigraphy (anterior view, acquired at 20 seconds) shows uptake in the lesion (arrowhead), less than that in the heart.
F, Delayed coronal SPECT image shows intense uptake in a sharply defined lesion (arrowhead).
|