"Hi everyone, I recently came across a study discussing the 'sigmoid notch sign' on head CT as a potential marker for differentiating between transverse sinus thrombosis and congenitally atretic sinuses in patients with absent transverse sinus flow on MR venography. The study highlighted a sensitivity of 91% and a specificity of up to 86%.

I would love to hear your thoughts on the following:

Thank you for sharing your insights!"