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CT and MR imaging in lateral sinus thrombosis
R M Irving1, N S Jones, M A Hall-Craggs
1Department of Otolaryngology, Hospital for Sick Children, London.
The Journal of Laryngology and Otology
|August 1, 1991
Summary
Diagnosing lateral sinus thrombosis pre-operatively is challenging due to non-specific symptoms. Advanced imaging like CT and MR scans are crucial for definitive diagnosis, aiding in timely treatment.
Area of Science:
- Neurology
- Radiology
- Vascular Imaging
Background:
- Lateral sinus thrombosis presents with non-specific clinical features, making pre-operative diagnosis difficult.
- Standard laboratory tests are often unhelpful in diagnosing this condition.
Observation:
- Computed Tomography (CT) may reveal an abnormally dense sinus lumen that fails to enhance post-contrast.
- Prominent enhancement of the surrounding dura, known as the 'empty triangle' or 'delta sign', can suggest thrombosis.
Findings:
- Magnetic Resonance (MR) imaging offers definitive evidence by detecting absent sinus flow and abnormal signal intensity.
- MR imaging provides superior visualization of venous sinus patency compared to CT.
Implications:
- Accurate pre-operative diagnosis of lateral sinus thrombosis is essential for appropriate patient management.
- Advanced imaging techniques like CT and MR are vital tools for confirming lateral sinus thrombosis.
- Improved diagnostic accuracy can lead to earlier intervention and better patient outcomes.