Imaging lesions of the cavernous sinus.

Area of Science:

• Radiology
• Neurology
• Oncology

Background:

• The cavernous sinus (CS) is a complex venous plexus at the skull base.
• Lesions affecting the CS can arise from various neoplastic, inflammatory, and vascular processes.
• Accurate imaging is crucial for diagnosis and management.

Purpose of the Study:

• To review and illustrate the characteristic imaging findings of common cavernous sinus lesions.
• To differentiate between neoplastic, inflammatory, and vascular pathologies within the CS.
• To highlight the utility of MRI in evaluating CS abnormalities.

Main Methods:

• Review of imaging findings from a range of cavernous sinus pathologies.
• Correlation of imaging features with histopathological or clinical diagnoses.
• Emphasis on Magnetic Resonance (MR) imaging characteristics.

Main Results:

• Neurogenic tumors and cavernomas are the most prevalent CS lesions.
• Metastatic disease from nasopharynx, skull base, and sphenoid sinus tumors can involve the CS.
• Inflammatory and infective lesions may show nonspecific enhancement patterns, often requiring evaluation of extracavernous involvement.
• MR imaging demonstrates high sensitivity for vascular lesions like carotid cavernous fistulas, aneurysms, and thromboses.

Conclusions:

• Imaging plays a vital role in diagnosing diverse cavernous sinus pathologies.
• Recognizing specific imaging patterns aids in differentiating lesion types.
• MRI is indispensable for evaluating vascular abnormalities within the cavernous sinus.