The gland that is located in the hypophyseal fossa of a sphenoid bone is:

Appeared in: DSSSB 13 August 2024

Explanation

The pituitary gland, also known as the hypophysis, is a small endocrine gland that plays a major role in regulating vital body functions.
It is situated in a bony cavity called the sella turcica, which is a depression in the sphenoid bone located at the base of the skull.
The specific part of the sella turcica that cradles the pituitary gland is called the hypophyseal fossa.
The term 'hypophyseal' is the adjective form for 'hypophysis', making the pituitary gland the correct answer by definition.

Why Other Options Were Wrong

Option A: The adrenal glands are located in the abdominal cavity, not the skull. They are situated on top of each kidney.
Option C: The thyroid gland is located in the anterior aspect of the neck, inferior to the thyroid cartilage (Adam's apple).
Option D: The thymus gland is located in the chest, specifically in the superior mediastinum, posterior to the sternum. It is primarily a lymphatic organ.

Related Visual

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Anatomy of the Endocrine System: Gland Location as background academic context rather than a clinical decision trigger.
The pituitary gland's location within the confined space of the sella turcica makes it vulnerable. Pituitary adenomas (tumors), even if benign, can compress adjacent structures.
A common complication of a growing pituitary tumor is the compression of the optic chiasm, which lies directly above the gland. This typically causes bitemporal hemianopsia, a loss of vision in the outer (temporal) visual fields of both eyes.
Surgical removal of pituitary tumors is often performed using a transsphenoidal approach, where instruments are passed through the nasal cavity and the sphenoid sinus to reach the gland, avoiding the need for a craniotomy.

How to Approach the Question

This is a factual recall question testing knowledge of anatomy.
First, identify the key anatomical landmarks mentioned in the question: 'hypophyseal fossa' and 'sphenoid bone'.
Recognize the linguistic clue: the word 'hypophyseal' directly relates to 'hypophysis', which is the alternative name for the pituitary gland.
This strong association immediately points to the pituitary gland as the most likely answer.
To confirm, mentally (or by elimination) place the other glands in their correct anatomical locations: adrenal (abdomen), thyroid (neck), and thymus (chest), confirming they are not in the skull.

Concept Tested & Keywords

Concept Tested: Anatomy of the Endocrine System: Gland Location
Stem keywords: gland, hypophyseal fossa, sphenoid bone
Lead-in keywords: is

Question ID

QgvgpVotpAGn0vAD8Z3Sx7

Reference Book

E6 Anatomy Applied Ashalatha 4e p. 214-216

E6 Robert Boland, Marcia L. Verduin - Kaplan and Sadock's Comprehensive Text of Psychiatry-Wolters Kluwer Health (2024) (pp 1-16525 of 16525) p. 2311-2313

E6 Pathology- ROBBINS & COTRAN PATHOLOGIC BASIS OF DISEASE 10TH Ed p. 1065-1067

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