The tuberculum sellae (or the tubercle of the sella turcica) is a slight[1] median elevation upon the superior aspect of the body of sphenoid bone (that forms the floor of the middle cranial fossa[2]: 508-509 ) at the anterior boundary of the sella turcica (hypophyseal (pituitary) fossa)[2]: 509  and posterior boundary of the chiasmatic groove.

[3][2]: 509  A middle clinoid process flanks the tuberculum sellae on either side.

[2]: 509

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