Multiple Fenestrated Dural Venous Sinuses: A Case Report.

Variations of the intradural venous sinuses are common. However, to the best of our knowledge, multiple fenestrated sinuses in the same specimen have not previously been reported. Herein, we report the cadaveric findings of fenestrations found in the left and right transverse and superior sagittal sinuses (SSS). The right transverse sinus was more superiorly located compared to its left counterpart. No occipital sinus was identified, and the straight sinus drained near the proximal left transverse sinus. The right transverse sinus was dominant and slightly larger in diameter throughout its course. Variation in the dural venous system is essentially a rule rather than an exception; however, configurations of these structures can be used as anatomical landmarks, making knowledge of potential anatomical variations of the dural venous sinuses critical for precluding complications during endovascular or neurosurgical procedures. The embryological development of these sinuses is also discussed.