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What is the Sellar diaphragm?


What is the Sellar diaphragm?

The diaphragma sellae or sellar diaphragm is a flat piece of dura mater with a circular hole allowing the vertical passage of the pituitary stalk. It retains the pituitary gland beneath it in the fossa hypophyseos as it almost completely roofs the fossa hypophyseos of the sella turcica, a part of the sphenoid bone.

Where is the Diaphragma sella?

pituitary fossa
The diaphragma sellae is a sheet of dura mater that forms the roof of the pituitary fossa. It is described as a two-layer sheet of dura mater that merges anteriorly with the dura covering the planum sphenoidale and the anterior cranial fossa and posteriorly with the dura covering the dorsum sellae and the clivus.

What is Sellar?

The sellar and parasellar regions constitute an anatomically complex area comprising various important neurovascular structures within a small space. The sellar region includes the sella turcica and the pituitary gland, together with the ventral adenohypophysis and dorsal neurohypophysis.

What is Sellar anatomy?

Parasellar Region Anatomy The sella turcica is a midline depression in the sphenoid bone which contains the pituitary gland and distal portion of the pituitary stalk. Inferiorly, the sella turcica has a thin floor of cortical bone, below which lies the sphenoid sinus.

Where is pituitary glands?

The pituitary gland is a small, bean-shaped gland situated at the base of your brain, somewhat behind your nose and between your ears. Despite its small size, the gland influences nearly every part of your body. The hormones it produces help regulate important functions, such as growth, blood pressure and reproduction.

What is the function of Diaphragma Sellae?

The diaphragma sellae forms the roof of the sella turcica (see Figure 10-1). It covers the pituitary gland, except for a small central opening in its center, which transmits the pituitary stalk.

What is a Sellar Suprasellar mass?

Suprasellar masses are neoplastic, vascular, congenital, or infectious/inflammatory in origin. Suprasellar masses present with a variety of neurologic or endocrine dysfunctions depending on their site of origin and mass effect on adjacent structures.

What is Sellar region?

The sellar region is a tiny anatomic compartment in which many lesions and developmental diseases can be found. The area immediately around the pituitary, the sellar region and parasellar region, is an anatomically complex area that represents a crucial crossroads for important adjacent structures.

What is Sellar Mass?

Background: Sellar masses (SM) are mostly benign growths of pituitary or nonpituitary origin that are increasingly encountered in clinical practice. To date, no comprehensive population-based study has reported the epidemiology of SM from North America.

What is a Tuberculum?

a nodule or small eminence, especially one on a bone, for attachment of a tendon; see also tuber and tuberosity. Called also tuberculum. adj., adj tuber´cular, tuber´culate. 2. a small, rounded nodule produced by the bacillus of tuberculosis (Mycobacterium tuberculosis).

Where is the diaphragma sellae located in the skull?

The diaphragma sellae is located in the center of the skull base; it continues anteriorly with the dura mater that covers the planum of the sphenoid bone and the anterior cranial fossa, posteriorly with the dura mater covering the dorsum sellae and clivus, and laterally with the superficial layer of the roof and lateral wall of the cavernous sinus.

Is the diaphragma sellae an extension of the dura?

The diaphragma sellae is an extension of the dura that separates the pituitary from the neural structures located superiorly including the optic chiasm. Chirag G. Patil,

What happens if you violate the diaphragma sellae?

Violation of the diaphragma sellae during an endoscopic endonasal transsphenoidal pituitary tumor resection will result in a cerebrospinal fluid leak. Dura mater and its processes exposed by removing part of the right half of the skull, and the brain.

Where does the diaphragma sellae cover the pituitary gland?

It covers the sella turcica and forms the roof over the pituitary fossa 1. The diaphragma sellae consists of two horizontal leaves of dura mater on the sphenoid bone. It extends from the tuberculum sellae to the posterior clinoid processes and dorsum sellae and covers the sella turcica and pituitary gland within 1.