Intratemporal vascular tumors: detection with CT and MR imaging

Area of Science:

• Neurology
• Radiology
• Ophthalmology

Background:

• Benign intratemporal vascular tumors can cause facial nerve dysfunction.
• Accurate diagnosis is crucial for effective treatment planning.

Purpose of the Study:

• To compare the diagnostic efficacy of computed tomography (CT) and magnetic resonance (MR) imaging for benign intratemporal vascular tumors.
• To determine the optimal imaging sequence for evaluating facial nerve dysfunction caused by these tumors.

Main Methods:

• Retrospective analysis of 12 patients with histologically confirmed benign intratemporal vascular tumors (hemangioma or vascular malformation).
• Comparison of diagnostic findings from CT and MR imaging in tumors located in the internal acoustic canal and geniculate ganglion region.
• Correlation of imaging results with clinical presentation and histological findings.

Main Results:

• MR imaging demonstrated all six tumors in the internal acoustic canal, whereas CT required gas cisternography in both cases.
• CT identified five of six geniculate ganglion tumors, with one questionable result.
• MR imaging identified only two of five geniculate ganglion tumors, suggesting lower sensitivity in this specific location.

Conclusions:

• MR imaging is the preferred initial modality for evaluating suspected benign intratemporal vascular tumors, particularly those in the internal acoustic canal.
• CT remains valuable for further assessment, especially when MR findings are negative or equivocal for geniculate ganglion lesions.
• A combined imaging approach may be necessary for comprehensive diagnosis and management of intratemporal vascular tumors.