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Diaphragma sellae

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Diaphragma sellae
Tentorium cerebelli seen from above. (Diaphragma sellae labeled at upper left.)
Details
Identifiers
Latindiaphragma sellae
TA98A14.1.01.107
TA25378
FMA78540
Anatomical terminology

The diaphragma sellae or sellar diaphragm is a small, circular sheet of dura mater forming an (incomplete) roof over the sella turcica and covering the pituitary gland lodged therein. The diaphragma sellae forms a central opening to accommodate the passage of the pituitary stalk (infundibulum)[1] which interconnects the pituitary gland and the hypothalamus.

The diaphragma sellae is an important neurosurgical landmark.[1]

Anatomy

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Boundaries

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The diaphragma sellae has a posterior boundary at the dorsum sellae and an anterior boundary at the tuberculum sellae along with the two small eminences (one on either side) called the middle clinoid processes.

Variation

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The opening formed by the diaphragma sellae varies greatly in size between individuals.[1]

Clinical significance

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Pituitary tumours may grow to extend superiorly beyond the diaphragma sellae.[1] Violation of the diaphragma sellae during an endoscopic endonasal transsphenoidal pituitary tumor resection will result in a cerebrospinal fluid leak.[citation needed]

Additional images

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References

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  1. ^ a b c d Standring, Susan (2020). Gray's Anatomy: The Anatomical Basis of Clinical Practice (42nd ed.). New York. p. 398. ISBN 978-0-7020-7707-4. OCLC 1201341621.{{cite book}}: CS1 maint: location missing publisher (link)

Public domain This article incorporates text in the public domain from page 814 of the 20th edition of Gray's Anatomy (1918)

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