greek.doctor

56. Hyperprolactinemia: Difference between revisions

Page Discussion

56. Hyperprolactinemia (view source)

Revision as of 10:43, 8 May 2024

1,475 bytes removed ,  8 May
Replaced content with "= Prolactin = {{#lst:Prolactin|pathophysiology}} = Hyperprolactinaemia = {{#lst:Hyperprolactinaemia|pathophysiology}} Category:Pathophysiology 2"
VisualWikitext
(Created page with "Prolactin is produced by the anterior pituitary in pregnancy, sleep, lactation, stress, physical exercise and hypoglycaemia. It stimulates the growth of glandular tissue in the breast and is necessary to produce milk. Prolactin inhibits FSH and LH. Dopamine usually inhibits the secretion of prolactin. TRH stimulates the production of prolactin. Hyperprolactinaemia may be physiological in the situations described above, but it may also be pathological. Pathological hype...")
 
(Replaced content with "= Prolactin = {{#lst:Prolactin|pathophysiology}} = Hyperprolactinaemia = {{#lst:Hyperprolactinaemia|pathophysiology}} Category:Pathophysiology 2")
Tags: Replaced Visual edit
 
Line 1: Line 1:
Prolactin is produced by the anterior pituitary in pregnancy, sleep, lactation, stress, physical exercise and hypoglycaemia. It stimulates the growth of glandular tissue in the breast and is necessary to produce milk. Prolactin inhibits FSH and LH.
= Prolactin =
{{#lst:Prolactin|pathophysiology}}
= Hyperprolactinaemia =
{{#lst:Hyperprolactinaemia|pathophysiology}}


Dopamine usually inhibits the secretion of prolactin. TRH stimulates the production of prolactin.
Hyperprolactinaemia may be physiological in the situations described above, but it may also be pathological. Pathological hyperprolactinaemia occurs in:
* Prolactinomas – prolactin-producing pituitary adenomas – most common cause
* Damage to the hypothalamus and infundibular stalk – as this impairs the dopamine-mediated inhibition of prolactin
* Hypothyroidism – as TRH stimulates prolactin
* Dopamine antagonists
* Chronic renal failure – due to decreased excretion
The most common symptoms of hyperprolactinaemia are:
* Decreased gonadotropic effects
** Hypogonadism
** Amenorrhea
** Infertility
** Gynecomastia
** Decreased libido
* Galactorrhoea – non-physiological milk discharge
* Bilateral hemianopsia – if caused by a tumor which compresses the optic chiasm
The cause of the decreased gonadotropic effects should be explained. As the level of prolactin is high will the body try to counteract this by producing more dopamine, which usually suppresses prolactin production. Dopamine fails to do this however, but it does suppress the production of GnRH, which decreases LH and FSH, which decreases testosterone and oestrogen production.
The treatment of choice is dopamine agonists and treating the underlying cause.
[[Category:Pathophysiology 2]]
[[Category:Pathophysiology 2]]