Intraluminal dural venous sinus cyst simulating as aerocele in computerized tomography brain

Intradural venous sinuses are commonly visualized structures in the CT brain, even in noncontrast images. Rarely, hypoattenuating focal lesions may be observed within their lumen as a coincidental finding, which may remain undiagnosed. However, when such lesions appear in the patients who are scanned for head injury, they might pose diagnostic difficulties