postlunate fissure
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Fissure — A cleft or groove. A fissure can be normal or abnormal. A fissure in the cerebral cortex is a normal feature. It is a deep fold that involves the entire thickness of the brain wall. A fissure in the anus is distinctly abnormal. It is a painful… … Medical dictionary
fissura posterior superior cerebelli — [TA] posterior superior fissure: a fissure of the cerebellum between the simple lobule and the folium vermis. Called also f. postclivalis cerebelli [TA alternative], postclival fissure, and postlunate fissure … Medical dictionary