hyperandrogenism ppt 25.1.2011
DESCRIPTION
an overview of the causes and diagnosis of hyperandrogenismTRANSCRIPT
Hyperandrogenism and
virilization
Assoc Prof Dr Hanifullah Khan
Amira, Atiqah, Sufia
Objectives
1. Androgen2. Virilization3. Causes and patophysiology4. Sign and symptoms5. Question
What are androgens?These are generally referred to
as male hormonesThey stimulate or control the
development and maintenance of male characteristics
They are also the precursors of estrogens
Relationships between hormones
AndrogensTestosterone, dehydroepiandrosterone sulfate
(DHEAS), dehydroepiandrosterone (DHEA), androstenedione, and androstenediol
The ovaries produce 50% of circulating testosterone, 50% of the androstenedione and 20% of DHEA.
The adrenal glands produce all the DHEAS and 80% of the DHEA. The adrenals also secrete 50% of androstenedione and 25% of circulating testosterone.
Adrenal androgens increase in response to ACTH stimulation
LH stimulates theca cells of the ovaries to secrete androgens
Figure 1 Schematic overview of the generation of androgen precursors and their conversion towards active androgens in women.
Arlt W Eur J Endocrinol 2006;154:1-11
© 2006 Society of the European Journal of Endocrinology
Effect of androgens Fat deposition (small breast)
Androgens inhibit the ability of some fat cells to store lipids
Muscle mass (heavy mascular mass) Androgens promote the enlargement
of skeletal muscle cells Brain
Enhanced libido.
Effects of androgens on skin Pilosebaceous unit (PSU)
Androgens cause excess sebum secretion.
Lesions of the PSU are called acne.
Hair androgens promote the conversion of
vellus hairs to coarser terminal hair. excess growth of terminal hair in a male
pattern is called hirsutism. Follicles shrink causing a receding hair
line
Hirsutism Excessive male pattern hair growth
(face, back, chest, abdomen and inner thighs)
Graded with the Ferriman and Gallwey scoring system
Hirsutism of rapid onset and growth (over a few months) should raise the concern of an androgen secreting tumour or intersex state
Please note that the appearance of hair on the upper lip or mild hirsutism does not necessarily constitute hyperandrogenism, and ethnic origin should be taken into consideration.
Ferrimen-Gallwey
Facial hair
Overview of androgenic effects
Acanthosis nigricans
Male esutheon Receding hair line
Hirsutism
Why do women have androgens?Androgens have important functions
in women◦ Essential in the production of E2 (in
ovary & adipose tissue)◦ Responsible for dev. & maint. of axillary
& pubic hair◦ Important for libido
Virilization The development of exaggerated masculine characteristics, usually in women, often as a result of overproduction of androgensSo, if hyperandrogenism becomes extreme, virilization occurs
Symptoms of virilizationSymptoms of virilization include
◦ excess facial and body hair (hirsutism), ◦ baldness◦ acne◦ deepening of the voice◦ increased muscularity◦ an increased sex drive.
In women,◦ the uterus shrinks◦ the clitoris enlarges (clitoromegaly)◦ the breasts become smaller◦ normal menstruation stops (amenorrhea)
CAUSES AND PATHOPHYSIOLOGY
HyperandrogenismExcess of androgens may be caused
by:◦primary gonadal disorders◦primary adrenal disorders◦ iatrogenic
In practice though, the causes are restricted to a few conditions:PCOSCushing’s syndromeCAHTumours
PCOS◦A primary gonadal disorder
Characterized by multiple small cysts within the ovary and by excess androgen production from the ovaries
◦Increase in LH and androgen secretion◦Low aromatase levels (due to FSH
levels) therefore androgens can’t be converted to estrogens in peripheral tissue Excess androgens converted to
testosterone in peripheral tissue
Developmental origin of PCOS (adapted from Abbott et al., 2002).
Hum. Reprod. Update 2008;14:293-307
© The Author 2008. Published by Oxford University Press on behalf of the European Society of Human Reproduction and Embryology. All rights reserved. For Permissions, please email: [email protected]
Features of PCOS• Symptoms-
• Oligomenorrhoea/ammenorhea• Excessive hair • Infertility • May present with metabolic symptoms
• Sign-• Hirsutism• Acne• Acanthosis nigricans (increased velvety skin
pigmentation ex at the axilla)• Obesity
• Ix –• Clinical/biochemical signs of hyperandrogenism
(hirsutism)• Polyystic ovaires by ultrasound
Ovaries
Other features
Metabolic syndrome
Acanthosis nigricans
Rotterdam criteria 2003A meeting in Rotterdam crafted compromise
criteria ◦ Any two features from
Irregular cycles Hyperandrogenism Ultrasound demonstration of polycystic ovaries
◦ (Rotterdam ESHRE/ASRM Sponsored PCOS Consensus Workshop Group: Revised 2003 consensus on diagnostic criteria and long term health risks related to polycystic ovary syndrome. Fertil Steril 2004; 81:19)
Importantly, the Rotterdam criteria allows for ◦ the previously excluded ovulatory women with
features of PCOS◦ as well as for women with irregular cycles and
polycystic ovaries, but without any evidence of androgen excess
Primary adrenal disordersCushing’s diseaseCongenital adrenal hyperplasiaAdrenocortical neoplasms
Cushing’s disease◦Primary hypothalamic-pituitary
disease◦Oversecretion of ACTH from pituitary◦Presence of adenoma or areas of
corticotroph cell hyperplasia in the anterior pituitary
◦Lead to cortical hyperplasia ◦Causes hypercortisolism,
hyperandrogenism
Signs of Cushing’sHypercortisolism
◦central obesity, hyperhidrosis◦buffalo hump, moon face, striae
Hyperandrogenism ◦hirsutism, male pattern baldness,
acne, deepening of the voice, muscularity, and an sex drive
◦uterus shrinks, (clitoromegaly), the breasts become smaller, and normal menstruation stops (amenorrhea)
Congenital adrenal hyperplasiaDepends on the nature and severity of the enzymytic defect. Onset of clinical symptoms can occur in the • Perinatal period• Later childhood• Adulthood (less common)
Congenital adrenal hyperplasia
◦Autosomal recessive deficiency of an enzyme in the cortisol synthetic pathways.
◦Cortisol secretion is reduced and feedback leads to increased ACTH secretion to maintain adequate cortisol leading to adrenal hyperplasia.
◦Diversion of the steroid precursors into the androgenic steroid pathways occurs. Thus, 17-hydroxyprogesterone, androstenedione and testosterone levels are increased, leading to virilization.
Anterior pituitary
ACTH
Cholesterol
Pregnolone
17 - hydroxypregnenolone
17 - hydroxyprogesterone
21
11 – deoxycortisol
CortisolGlucocorticoid
s
Progesterone
21
Aldosterone
Corticosterone
11 - deoxycortisone
Mineralocorticoids
Testosterone
Androstenedione
Dehydroxypiandrosterone
Sex steroids
Adrenal cortex (bilateral hyperplasia)
Congenital adrenal
hyperplasia
Adrenocortical neoplasmsAdrenocortical neoplasms associated
with symptoms of excess of androgen are more likely to be androgen secreting adrenal carcinomas than adenomas.
It is also often assoc with hypercortisolism (mixed syndrome)
The tumour secretes androgen thus increasing in circulation and converted to testosterone at the peripheral tissues.
Tumours
Androgen secreting tumoursMay occur at any age.relatively rare. should be suspected when the onset of
androgenic symptoms is sudden (i.e., generally <2 yr) and the pace of symptoms is rapid, and when they lead to virilization and masculinization.
may be associated with other systemic symptoms including weight loss, anorexia, a feeling of abdominal bloating, back pain.
The goals of lab testing
1
Document androgen
excess
2Other
causes of androgen excess/ irregular
periods to be ruled
out
3Look for
metabolic abnormalit
iesEg
Glucose/ Lipids
Lab Testosterone and Dehydroepiandrosterone
sulphate (DHEAS)◦ DHEAS hyperandrogenemia of adrenal origin
Serum prolactinthyroid stimulating hormone (TSH)Serum 17 hydroxyprogesterone (17-OHP) test
–if suspect CAHLH and FSH ( suggestive of PCOS if ratio >2)Lipid profileOGTT
◦ Relying on a fasting glucose level alone is inadequate as it is a poor predictor of impaired glucose tolerance or diabetes
TVS
Therapy
CASE SCENARIO
A 22 year old nulligravid women presents to her gynaecologist because of irregular widely spread menses
History
1. What question would like to ask the patient?
Examination
1. Firstly, what systems would you like to assess
2. Secondly, what are the specific signs would you like to elicit?
Further cluesMenarche was at the age of 14, but she
has rarely had regular cycles. For the past year she has had only three complete menses. Once going 6 months between period. She is 165cm and weighs 83kg. She is over weight, with acne and a few dark hairs on her upper lip and chin. She is sexually active and uses condom for contraception.
3. What is the likely diagnosis
Summary of causes & diagnosis PCOS.
◦ At least two of the following three abnormalities were present: chronic anovulation, clinical or biochemical hyperandrogenism, and polycystic ovaries on ultrasound
NCAH.◦ Clinical hyperandrogenism + increased serum 17OHP or mildly
increased serum 17OHP with an increased response to ACTH ( Androgen-secreting tumors.
◦ The finding of an androgen-secreting tumors (ovarian or adrenal) in women with very high serum androgen levels
Idiopathic hirsutism.◦ Normal serum androgen levels (T, free T, and DHEAS) in the
presence of normal ovulatory cycles and normal ovaries on ultrasound.
Idiopathic hyperandrogenism.◦ Clinical hyperandrogenism, increased serum androgen levels in
the presence of normal ovulatory cycles, and normal ovaries on ultrasound
References Zawadski JK, Dunaif A. Diagnostic criteria for polycystic ovary syndrome:
toward a rational approach. In: Dunaif A, ESHRE/ASRM Revised 2003 consensus on diagnostic criteria and long-
term health risks related to polycystic ovary syndrome. Fertil Steril 2004; 81:19-25.
The Rotterdam ESHRE/ASRM-sponsored PCOS Consensus Workshop Group . Revised 2003 consensus on diagnostic criteria and long-term health risks related to polycystic ovary syndrome (PCOS). Hum Reprod 2004;19:41- 47.
Azziz R, Carmina E, Dewailly D, et al. Androgen Excess Society. Position statement: criteria for defining polycystic ovary syndrome as a predominantly hyperandrogenic syndrome: an androgen excess society guideline. J Clin Endo & Metab 2006; 91(11): 4237-4245.
Azziz R, Sanchez LA, Knochenhauer ES, Moran C, Lazenby J, Stephens KC, Taylor K, Boots LR 2004 Androgen excess in women: experience with over 1000 consecutive patients. J Clin Endocrinol Metab 89:453–462
E. Carmina, F. Rosato, A. Jannì, M. Rizzo, and R. A. Longo Relative Prevalence of Different Androgen Excess Disorders in 950 Women Referred because of Clinical Hyperandrogenism. JCEM 2006 91: 2-6; doi:10.1210/jc.2005-1457
Manage wisely