English: Circular Torcular Herophili. An unusual arrangement of the dural venous sinuses. Dissection of an adult male cadaver aged 87 years at death. This specimen had previously undergone blue latex injection of the intracranial venous system. Posteriorly, the region overlying the internal occipital protuberance was found to be encircled by a splitting of the superior sagittal sinus above into two more or less equal parts each draining into one of the transverse sinuses. Additionally, there was a midline connection between the left and right transverse sinuses, effectively forming a venous circle around the internal occipital protuberance, i.e., a circular torcular Herophili.