Laíse Ramos Neri,Bruno Siqueira Campos Lopes,Jorge Luís Wollstein Moritz,Lázaro Luís Faria do Amaral,Christiane Monteiro de Siqueira Campos, Entrapment of the Basilar Artery into the Sphenoid Sinus, With CSF Fistula, without Ischaemic Stroke: A Case Report Radiology and Medical Diagnostic Imaging 2020 2613-7836 http://dx.doi.org/10.31487/j.RDI.2020.03.01 https://www.sciencerepository.org/entrapment-of-the-basilar-artery-into-the-sphenoid-sinus_RDI-2020-3-101 Abstract: The basilar artery herniation into the sphenoid sinus secondary to skull base fracture is a rare condition. There have been few cases described worldwide. This entity carries a potential risk of basilar artery stenosis or occlusion, resulting in ischaemia and infarction of the brainstem and cerebellum. Images study such as computed tomography (CT) and MRI plays a crucial role in diagnosing this condition. We report a rare case that shows entrapment of the basilar artery into the sphenoid sinus, after a traumatic skull base fracture, without infarction of the brainstem and cerebellum, with CSF fistula.Keywords: Basilar artery herniation, basilar artery entrapment, skull base fracture, clivus, CSF fistula