- Sella turcica
Name = Sella turcica
GraySubject = 35
GrayPage = 147
Sphenoid bone. Upper surface. (There is no label for "Sella turcica", but "Tuberculum sellae" and "Fossa hypophyseos" are visible near center.)
Caption2 = Medial wall of left orbit. (Sella turcica labeled in upper right.)
DorlandsPre = s_07
DorlandsSuf = 12728179
The Sella turcica (literally [http://en.wikipedia.org/wiki/
] ) is a saddle-shaped depression in the
sphenoid boneat the base of the human skull.
The seat of the saddle is known as the
hypophyseal fossawhich holds the pituitary gland. Located anteriorly to the hypophyseal fossa is the tuberculum sellae.
Completing the formation of the saddle posteriorly is the
dorsum sellae. The dorsum sellae is terminated laterally by the posterior clinoid processes.
Since the sella turcica forms a bony
caudalborder for the pituitary gland, a pituitary tumorcan only extend upward in the rostraldirection. This can result in compression of the optic chiasmwhich lies on top of the pituitary, enveloping the pituitary stalk. Compression of the optic chiasm can lead to bitemporal hemianopsia, and when there is no relevant trauma, this clinical finding is pathognomonicfor a pituitary tumor.
Empty sella syndrome
cite book|author=Marieb, Elaine Nicpon;|title=Human Anatomy & Physiology / Elaine M. Marieb. 6th Edition|publisher=Pearson Education, Inc.|year=2004|id=ISBN 0-8053-5462-X -- Page 209
* [http://www.indiana.edu/~pietsch/sellaturcica400.jpgImage at Indiana.edu]
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