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Orbital cavernous hemangioma: findings on sequential Gd-enhanced MRI
Journal of Computer Assisted Tomography
|July 1, 1995
Summary
Orbital cavernous hemangiomas show a characteristic enhancement pattern on sequential gadolinium-enhanced MRI scans. This progressive, homogeneous enhancement is a key diagnostic sign for this orbital vascular malformation.
Area of Science:
- Radiology
- Ophthalmology
- Neuroimaging
Background:
- Orbital cavernous hemangiomas are benign vascular tumors.
- Accurate diagnosis is crucial for appropriate management.
- MRI is a key imaging modality for orbital lesions.
Purpose of the Study:
- To characterize the contrast enhancement pattern of orbital cavernous hemangiomas.
- To evaluate the utility of sequential gadolinium-enhanced MRI in diagnosis.
- To identify pathognomonic imaging features.
Main Methods:
- Six patients with orbital mass lesions underwent MRI.
- Sequential T1-weighted spin echo sequences were performed after gadolinium administration.
- Imaging was conducted immediately, 15-30 minutes, and up to 1 hour post-injection.
Main Results:
- Lesions were isointense on T1 and hyperintense on T2 weighted images.
- Initial central patchy enhancement was observed after gadolinium.
- Complete and homogeneous enhancement occurred between 20 and 60 minutes post-injection.
Conclusions:
- Sequential gadolinium-enhanced MRI reveals a distinct enhancement pattern for orbital cavernous hemangiomas.
- Progressive, homogeneous enhancement is a pathognomonic sign.
- This pattern aids in differentiating cavernous hemangiomas from other orbital masses.