Damage to the pituitary stalk blocks the release of antidiuretic hormone, resulting in polydipsia (abusive water intake) and polyuria (excessive urination).
What is the function of the pituitary stalk?
AKA infundibulum or pituitary stalk, the infundibular stalk is a tube-like structure that connects the posterior pituitary to the hypothalamus. It allows for hormones synthesized in the hypothalamus to be sent to the posterior pituitary for release into the bloodstream.
What does deviation of the pituitary stalk mean?
Deviation or tilt of the pituitary stalk can be seen without any underlying abnormality. … As a consequence of this critical position of the pituitary stalk, patients who develop pathology involving the stalk commonly present with varying degrees of hypopituitarism, diabetes insipidus, and hyperprolactinemia.
What causes a thickened pituitary stalk?
The common etiologies presenting with central diabetes insipidus (DI) associated with a thickened pituitary stalk in the pediatric population are: Langerhans Cell Histiocytosis (LCH), central nervous system tumors such as germinoma and craniopharyngioma, granulomatous lesions like tuberculosis and sarcoidosis and …
What is pituitary stalk compression syndrome?
The stalk compression syndrome refers to the symptoms and signs of hyperprolactinaemia in the presence of moderately raised prolactin concentrations and a sellar or suprasellar mass but distortion of the pituitary stalk alone does not correlate with prolactin concentrations.
What hormone does the pituitary gland secrete?
There are four hormones secreted by the anterior pituitary gland that control the functions of other endocrine glands. These hormones include thyroid-stimulating hormone (TSH), adrenocorticotropic hormone (ACTH), follicle-stimulating hormone (FSH), and luteinizing hormones (LH).
Which is the ultimate function of hormones?
Ultimately, hormones control the function of entire organs, affecting such diverse processes as growth and development, reproduction, and sexual characteristics. Hormones also influence the way the body uses and stores energy and control the volume of fluid and the levels of salts and sugar (glucose) in the blood.
What techniques are used to view or measure the pituitary gland?
Magnetic resonance imaging (MRI) is the imaging modality of choice for evaluating hypothalamic-pituitary-related endocrine diseases.
Which of the following symptoms could result from an anterior pituitary tumor?
Signs and symptoms of pressure from a pituitary tumor may include: Headache. Vision loss, particularly loss of peripheral vision.
How does prolactin stimulate milk production?
Prolactin stimulates milk biosynthesis within the alveolar cells of the breast and oxytocin stimulates contraction of the myoepithelial cells that surround the alveoli, causing the milk to be ejected into the ducts leading to the nipple.
What are the symptoms of a malfunctioning pituitary gland?
What are pituitary symptoms?
- Vision problems.
- Unexplained weight gain.
- Loss of libido.
- Feeling dizzy and nauseous.
- Pale complexion.
- Muscle wasting.
- Coarsening of facial features.
Is diabetes insipidus lifelong?
Diabetes insipidus is usually a permanent, lifelong condition and cannot be cured. However, the symptoms of constant thirst and urination can be well controlled with treatment with DDAVP, a synthetic kind of vasopressin, and normal, symptom-free quality of life can be restored.
Is Infundibulum the same as pituitary stalk?
The pituitary stalk, also known as the infundibulum or infundibular stalk, is largely outside the blood brain barrier like the rest of the pituitary and therefore normally enhances following the administration of gadolinium. …
Does the pituitary gland shrink with age?
The pituitary gland is located just below (anterior pituitary) or in (posterior pituitary) the brain. This gland reaches its maximum size in middle age and then gradually becomes smaller. It has two parts: The back (posterior) part stores hormones produced in the hypothalamus.
Is the pituitary gland inside the dura?
The pituitary gland is within the sella turcica or the hypophyseal fossa. … The reflections of the dura bound the fossa laterally and superiorly. Sellar Anatomy. The bony walls of the sella turcica surround the fossa in the anterior, posterior, and inferior margins.
What does an MRI of the pituitary gland show?
An MRI produces good soft-tissue images and allows the physician to evaluate different types of body tissue, as well as distinguish normal, healthy tissue from diseased tissue. Our team of specialist physicians will use these images to make a detailed study of your pituitary gland and to find possible problems.