Intravascular papillary endothelial hyperplasia in an intracranial thrombosed aneurysm: 3T magnetic resonance imaging and angiographical features

W Lee, F Hui, YY Sitoh
Correspondence: Dr Wickly Lee, wickly_lee@ttsh.com.sg

ABSTRACT
Enhancement of intracranial thrombosed aneurysms is an uncommon finding on magnetic resonance (MR) imaging, and can present diagnostic difficulties and complicate management decisions. We report a 46-year-old man who had an enhancing thrombosed intracranial aneurysm observed on 3T MR imaging. There was angiographical correlation, with follow-up serial MR imaging documenting regression and improvement. Findings are typical for benign intravascular papillary endothelial hyperplasia. Differential diagnoses of giant serpentine intracranial aneurysm and malignant angiosarcoma are discussed.

Keywords: 3T magnetic resonance imaging, angiosarcoma, emhancing intracranial thrombosed aneurysm, giant serpentine intracranial aneurysm, intravascular papillary endothelial hyperplasia
Singapore Med J 2004; 45(7): 330-333