Mimics and diagnostic pitfalls of intracranial lesions in conventional MRI: Clues on advanced MRI
- Author:
Alan Basil Peter
;
Norlisah Ramli
;
Kartini Rahmat
;
Faizatul Izza Rozalli
;
Che Ahmad Mazlan
- Publication Type:Journal Article
- MeSH:
Magnetic Resonance Imaging
- From:Neurology Asia
2015;20(2):161-165
- CountryMalaysia
- Language:English
-
Abstract:
Objective: To delineate and differentiate between late subacute hemorrhage and intracranial lipomas
in clinically available conventional and advanced MR sequences. Methods: Two cases of late subacute
hemorrhage and two cases of intracranial lipoma were reviewed with CT scans and 3.0T scanner MRI.
The sequences evaluated in MRI were T1-weighted (T1W) fast spin echo (FSE), T2-weighted (T2W)
FSE, gradient echo T2*-weighted (GRE T2*W) images, diffusion weighted (DWI), apparent diffusion
coefficient (ADC) and multivoxel spectroscopy. Results: Late subacute hemorrhage and intracranial
lipoma have similar imaging features on T1W, T2W FSE with blooming artefact at the margins on
GRE T2*W. However on GRE T2*W sequence, the central area of lipoma demonstrates low signal;
while hemorrhage demonstrates high signal. In DWI, late subacute hemorrhage shows hyperintensity;
while in lipoma there is loss of signal.
Conclusion: Awareness of the potential pitfalls in standard sequence are important, as these entities
appear to have similar T1W/ T2W characteristic with blooming artefact on T2*W. Knowing the
distinctive central signal intensity pattern on GRE T2W* and DWI is therefore essential to differentiate
between these lesions as there are differences to their clinical management.
- Full text:P020150707352387981936.pdf
