Cerebral venous sinuses: anatomical variants or thrombosis?

Area of Science:

• Neuroanatomy
• Radiology
• Vascular Anatomy

Background:

• Dural venous sinus anatomical variations are known but lack recent detailed analysis.
• Cerebral venous thrombosis is often suspected in neurological cases but frequently unconfirmed.
• Radiological findings suggestive of thrombosis may represent anatomical variations.

Purpose of the Study:

• To conduct a detailed anatomical study of dural venous sinus variations.
• To clarify the relationship between anatomical variations and radiological findings.
• To differentiate anatomical variations from actual cerebral venous thrombosis.

Main Methods:

• Anatomoradiological investigation of 70 fresh cadavers.
• Comparison with angiographic examinations of 100 patients without venous pathology.
• Review of embryology literature.

Main Results:

• Demonstrated that absence or hypoplasia of dural venous sinuses are significant anatomical variations.
• Showed that certain radiological findings, like the 'delta sign', can result from these anatomical variations.
• Highlighted the potential for misinterpretation of anatomical variations as cerebral venous thrombosis.

Conclusions:

• Anatomical variations of dural venous sinuses are a frequent cause of imaging findings misinterpreted as cerebral venous thrombosis.
• Radiological interpretation must consider anatomical variations to avoid misdiagnosis.
• Understanding these variations is crucial for accurate neurological diagnosis.