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Cavernous hemangiomas of the orbit: MR imaging
M Thorn-Kany1, P Arrué, M B Delisle
1Department of Neuroradiology, CHU Toulouse Rangueil, France.
Journal of Neuroradiology = Journal De Neuroradiologie
|August 13, 1999
Summary
Magnetic resonance imaging (MRI) findings can help diagnose orbital cavernous hemangiomas. These well-defined masses show specific signal characteristics on T1- and T2-weighted sequences and progressive enhancement after Gadolinium contrast administration.
Area of Science:
- Ophthalmology
- Radiology
- Neurosurgery
Background:
- Orbital cavernous hemangiomas are benign vascular tumors.
- They often present with progressive visual symptoms like proptosis.
Purpose of the Study:
- To describe the characteristic MR imaging findings of orbital cavernous hemangiomas.
- To correlate imaging findings with clinical presentation and surgical pathology.
Main Methods:
- Retrospective review of CT, MR imaging, and echography in eight patients with orbital cavernous hemangioma.
- Detailed analysis of MR sequences (T1, T2, post-Gadolinium) and CT/echographic features.
- Correlation of imaging findings with clinical symptoms and surgical outcomes.
Main Results:
- MRI revealed well-defined, intraconal masses with homogeneous signal intensity (isointense on T1, hyperintense on T2).
- Peripheral hypointense rim observed in some cases.
- Progressive, homogeneous enhancement after Gadolinium administration was a key finding.
- CT showed hyperdense masses with microcalcifications; echography revealed hyperechogenic, heterogeneous lesions.
Conclusions:
- Specific MR imaging features, including signal characteristics and progressive Gadolinium enhancement, are highly suggestive of orbital cavernous hemangioma.
- MRI is a valuable tool for diagnosing orbital cavernous hemangiomas, especially in patients with painless progressive proptosis.