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¹Ankara Üniversitesi, Tıp Fakültesi, Nöroşirürji Anabilim Dalı, Ankara, Türkiye Posterior fossa is the deepest one of all canial fossas. It contains the structures related to vital functions. Posterior fossa comprises from tentorial incisura to the foramen magnum. Vascular supply of the posterior fossa is provided by vertebral and basilary arteries and their branches. There are 3 main approaches to this fossa; Median suboccipital, paramedian suboccipital and retrosigmoid (retroauricular) approaches. In this review, we tried to show these 3 approaches by a cadaver study. Anahtar Kelimeler : Posterior fossa, Median approach, Paramedian approach, Retrosigmoid approach