Tardieu GG, Oskouian RJ, Loukas M, Tubbs RS.A previously undescribed variant of the confluence of sinuses.Folia Morphol (Warsz). 2016 Nov 4. doi: 10.5603/FM.a2016.0063.
An eight-year old female with a history of chronic headaches and uncertain papilledema was found to have a variant of the posterior intracranial dural venous sinuses on Magnetic Resonance Imaging (MRI) assessment of the brain. Magnetic Resonance Venography (MRV) included in the imaging revealed a circular formation of the confluence of sinuses and absent right-sided Transverse Sinus (TS). The confluence of sinuses is a highly variable structure, however, to the authors' knowledge, a circular confluence of sinuses variant has not been reported in the literature.