diseases of the gonads - a semmelweis egyetem kútvölgyi ... · organ before puberty after puberty...
TRANSCRIPT
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DISEASES OF THE GONADS
Dr. Peter Igaz PhD
2nd Department of MedicineSemmelweis University
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Symptoms of androgen deficiency 1.Organ before puberty after pubertyBones eunuchoid appearance osteoporosis
Hair growth lack of beard growth, diminishing forehead hair line, sexual hair pubic hair line growth
Larynx no voice change -Skin decreased activity of atrophy
sebaceous glands, no acnes wrinklesBone marrow anemia anemiaMuscles underdeveloped atrophyPenis infantile no change in size
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Organ before puberty after puberty
Prostate underdeveloped atrophy
Spermatogenesis not initiated halted
Libido, Potency no loss
Symptoms of androgen deficiency 2.
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Forms of hypogonadism
Central, secondary, hypogonadotropLH, FSH low
Gonadal, primary, hypergonadotrop
LH, FSH high
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Causes of central hypogonadism
• Kallmann-Syndrom– GnRH deficiency + Anosmia/Hyposmia
• Prader-Willi-Labhart syndrom– GnRH deficiency, obesity, low body height,
newborn hypotony, diabetes mellitus type 1, strabismus, scoliosis, mental retadation.
• Pituitary insufficiency• Hyperprolactinemia
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Therapy of central hypogonadism
• Androgens– Testosteron enanthat, cypionat i.m.,
transdermal, per os (hepatotoxic)• LH, FSH, hCG
– i.v. for fertility• GnRH, GnRH-agonists
– pulsatile, pump for fertility
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Causes of male gonadal hypogonadism
• 1. Klinefelter syndrome (small testes, no spermatogenesis, gynecomastia, breast cancer).
• 2. del Castillo syndrome, Sertoli cell only syndrome, no spermatogenis
• 3. Noonan Syndrom (male Turner sy.)• 4. Chemical and biological testis damage
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Primary amenorrhoeapuberty
Secondary amenorrhoeapregnancymenopause
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Causes of amenorrhoea• Hypothalamus
– Kallmann Syndrom– Anorexia nervosa
• Hypophyse– Sheehan Syndrom
(ischemic necrosis of the pituitary)– Hyperprolactinemia
• Ovaries– Dysgenesis of the ovaries (Turner
syndrome)– Stein-Leventhal syndrom, PCO
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Turner-syndromegonadal dysgenesis
Primary amenorrheaStreak gonadsPterygium colliSmall stature (133-153 cm)Cardiovascular Anomalies
Estrogen for secondary sexual characteristics
GH for growth promotion
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Pseudohermaphroditism
• Pseudohermaphroditism: chromosomal and gonadal sex is different from phenotpye
• Female pseudohermaphroditism– Chromosomal and gonadal sex: woman– Phenotype: male
• Male pseudohermaphroditism– Chromosomal und gonadal sex: male– Phenotype: female
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Hirsutismandrogen-dependent regions
e.g.: face, breast, belly
HypertrichosisNon-androgen-dependent regions
e.g. exremities
Increased hair growth
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VirilisationIn utero virilisation
Intersexuality –female pseudohermaphroditism
Virilisation in adultsclitoris hypertrophyhirsutismmale type baldnessdeeper voicesecondary amennorhoea
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Causes of virilisation
• 1. endocrine diseases– Adrenal causes
• androgen-secreting adenoma• androgen-secreting adrenocortical cancer• Cushing syndrome• congenital adrenogenital syndrome
– Ovarian causes– Akromegaly
• 2. Idiopathic• 3. Drugs• 4. Other – e.g. anorexia nervosa
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Pathogenesis of adrenogenital syndromes
Other steroids
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Adrenogenital syndrome (AGS)
Deficiency of enzyme products (cortisol, mineralocorticoids)
AND
Increased concentration of steroid precursors
VirilisationFemale pseudohermaphroditism
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21-Hydroxylase deficiency
• Most frequent cause of AGS• Major forms:
– Classic 21-Hydroxylase deficiency (1:14.000)• salt-losing form• simple virilising form
– Non-classic 21-Hydroxylase deficiency(1:50-1:1000)• late-onset Form (postnatal virilisation, hirsutism,
infertility, menstrual cycle abnormalities)• asymptomatic forms: only hormonal examinations
can detect them
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Pathogenesis of 21-hydroxylase deficiency
Testosteron
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21-hydroxylase deficiency
• Salt-losing form: deficiency of cortisol and aldosterone: hyperkalemia, hyponatremia, fluid loss, shock.
• Increased production of DHEA, androstendion and testosterone, therefore virilisation.
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Hormonal Diagnosis:increased serum concentraton of steroid precursors: 17-OH-Progesteron (>80 ng/ml) and urinary pregnantriol.
Synacthen test (tetracosactid, 250 μg i.v.)
Therapy of 21-hydroxylase deficiency• Glukokortikoids• Hydrocortison:
– Adults 20-30 mg/Tag• Dexamethason
– Adults: 0.25-0.5 mg am Abend
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Polycystic Ovarian Syndrome (PCO),Stein-Leventhal Syndrom
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PCO diagnostic criteria
• Hyperandrogenism with or without skin alterations
• Abnormalities of menstrual cycle –raromenorrhoea or secondary amenorrhoea
• Other causes of hyperandrogenism excluded (e.g.: adrenogenital syndrome, Cushing syndrome)
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Hormone results in PCO
• Increased serum testosterone and DHEAS
• High insulin concentrations (oral glucose tolerance test, 75 g)
• Increased LH/FSH ratio
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Therapy of PCO
• Weight reduction.• Metformin against insulin resistance• Contraceptive pills – estrogen +
cyproterone-acetate antiandrogenic protesterone derivative
• Induction of ovulation (Clomiphen, LH, FSH, GnRH agonists)
• Gynecologic interventions: laser coagulation, elektrocoagulation, partial wedge resection of the ovaries