Female patho 0514FA Flashcards
Klinefelter XXY
testicular atrophy, small and firm. eunuchoid body shape. TALL with long extremities. gynecomastia. female hair distribution. decreased muscle mass.
*Barr body (inactivated X chromo).
when does Klinefelter present?
in puberty…
common cause of hypogonadism in infertility workup.
is there developmental delay assoc with Klinefelter?
maybe…. most have normal intelligence.
increased risk and severity of MR with each additional X chromo.
cause of Klinefelter
meiotic nondisjunction in gametogenesis
hormones in Klinefelter
dysgenesis of seminiferous tubules = decreased inhibin = INCREASED FSH.
abnormal Leydig function = decreased testosterone = INCREASED LH = INCREASED ESTROGEN.
Turner XO
short stature. ovarian dysgenesis (streak ovary). infertility. broad shield chest. widely spaced nipples.
heart findings in Turner
bicuspid aortic valve.
preductal coarctation of aorta.
aortic dissection (adults).
lymphatic defects in Turner
webbing of neck (cystic hygroma).
lymphedema in feet, hands.
low posterior hairline.
what renal anomaly is common in Turner?
horseshoe kidney
what ovarian tumor is common in Turner?
dysgerminoma
Turner is the most common cause of…?
primary amenorrhea - due to ovarian failure.
menopause before menarche. no breast development.
hormones in Turner
decreased estrogen = increased LH, FSH
double Y males XYY
phenotypically normal. very TALL. severe acne. antisocial behavior. normal fertility. small % diagnosed with autism spectrum d/o.
hormone levels when androgen receptor is defective
increase T. increase LH (sense low T).
hormone levels with testosterone-secreting tumor or exogenous steroids
increase T.
decrease LH.
hormone levels with primary hypogonadism
decrease T.
increase LH.
hormone levels with hypogonadotropic hypogonadism
decrease T.
decrease LH.
female pseudohermaphrodite XX
ovaries present.
external genitalia virilized or ambiguous.
due to:
excessive and inappropriate exposure to androgenic steroids during early gestation, i.e. CAH or exogenous androgens
male pseudohermaphrodite XY
testes present.
external genitalia are female or ambiguous.
most commonly due to:
androgen insensitivity syndrome (testicular feminization)
true hermaphroditism
46XX or 47XXY.
both ovary and testicular tissue present (ovotestis).
ambiguous external genitalia.
very rare.
androgen insensitivity syndrome
46XY.
defect in androgen receptor results in normal-appearing female…. female external genitalia. rudimentary vagina. no sexual hair.
why are uterus and uterine tubes absent in AIS?
AMH is still present
development of testes in AIS?
yes - often found in labia majora. surgically remove to prevent malignancy.
hormones in AIS
increased testosterone, estrogen, LH.