Fact-sheet: Intravascular papillary endothelial hyperplasia
Updated on 03/27/2020 at 3:51 PM
Note : 0/10
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Definition
Pseudotumor resulting from intravascular organization of a thrombus, or more rarely from re-endothelialization of an extravascular hematoma, described by Masson under the name "intravascular papillary endothelial hyperplasia."
MRI
Superficial lesion of the head, neck, trunk, and fingers
Heterogeneous mass on T1 with hemorrhagic areas of high signal intensity
On T2, peripheral high signal intensity. The signal varies depending on the age of the lesion:
- hyperintense relative to muscle up to the third week
- then progressive decrease in signal over the following 3 weeks
Heterogeneous, peripheral, and septal enhancement after injection. Non-enhancing avascular areas = thrombus
Differential diagnosis
Neurogenic tumors, vascular sarcoma
