What is Diaphragma sella?
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 passes through the diaphragma sellae?
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.
What is sella turcica significance?
During embryological development, the sella turcica area is the key point for the migration of the neural crest cells to the frontonasal and maxillary developmental fields. The neural crest cells are involved in the formation and development of sella turcica and teeth.
What causes empty sella turcica?
Primary empty sella syndrome occurs when one of the layers (arachnoid) covering the outside of the brain bulges down into the sella and presses on the pituitary. Secondary empty sella syndrome occurs when the sella is empty because the pituitary gland has been damaged by: A tumor. Radiation therapy.
What is empty sella?
Definition. Empty Sella Syndrome (ESS) is a disorder that involves the sella turcica, a bony structure at the base of the brain that surrounds and protects the pituitary gland. ESS is often discovered during radiological imaging tests for pituitary disorders. ESS occurs in up to 25 percent of the population.
What is Tuberculum sella?
The tuberculum sellae (or the tubercle of the sella turcica) is a part of the sphenoid bone that is an elevation behind the chiasmatic groove. A variable slight to prominent median elevation forming the posterior boundary of the chiasmatic groove and the anterior boundary of the hypophysial fossa.
What bone is the sella turcica part of?
The sphenoid bone
Introduction: The sphenoid bone has a superior depression called the sella turcica, Latin for “Turkish saddle,” where the pituitary gland is found.
What does the sella turcica contain?
The sella turcica is a midline depression in the sphenoid bone which contains the pituitary gland and distal portion of the pituitary stalk.
What is the other name of sella turcica?
Abstract. Introduction: The sphenoid bone has a superior depression called the sella turcica, Latin for “Turkish saddle,” where the pituitary gland is found.
What is the function of the sella turcica of the sphenoid bone?
Function. The sella turcica forms a bony seat for the pituitary gland.
What is diaphragma sellae?
Diaphragma sellae. 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.
The sella turcica is a midline depression in the sphenoid bone which contains the pituitary gland and distal portion of the pituitary stalk. The sella is covered by a dural reflection (i.e., diaphragma sellae) above which lies the suprasellar cistern.
What is the function of sella turcica adenoma?
Large adenomas can cause remodeling of the underlying sphenoid bone altering the shape of the sella turcica. Sella turcica is also usually used as a reference point with nasion to establish the base of the skull in cephalometric analysis. This is commonly done prior to orthodontic treatment.
How do you diagnose an empty sella turcica?
Empty sella turcica. The lateral X-ray of the head may expose the enlargement of the sella. CT scans (computerised tomography scans) can provide the image of the pituitary fossa filled up with large quantity of watery fluid or CSF. MRI (Magnetic resonance imaging) can provide a confirmatory diagnosis of an empty sella.