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Retired NBME 20 Answers

nbme20/Block 3/Question#22 (reveal difficulty score)
In patients with breast cancer, metabolically ...
Gonadotropin by the pituitary gland ๐Ÿ” / ๐Ÿ“บ / ๐ŸŒณ / ๐Ÿ“–
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submitted by โˆ—hayayah(1212)
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GnRH agonists like Leuprolide are effective for patients with breast CA because if given in a continuous fashion, they downregulate the GnRH receptor in the pituitary and ultimately decrease FSH and LH.

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md_caffeiner  Quick question: FA19 691 says Leuprolide ClINICAl USE is Uterine fibroids, endometriosis, precocious puberty, prostate cancer, infertility... I guess all except infetility(pulsatile?) are used as continuous? +1
usmlecrasher  GnRH is synthesized and released in pulsatile fashion , so if you give in pulsatile way you induce GnRH effect , and if given in continuous way it will suppress synthesis, depended the desired effect you want to achieve - infertility induce GnRH with pulsatile , stop synthesis for prostate cancer , testicular cancer , hormone dependent Breast cancer give continuous +1
djeffs1  I thought Gonadotropin was released by the Hypothalamus, not the pituitary gland. am I crazy? +
kevintkim4  ^ Gonadotropins are referring to LH/FSH; Gonadotropin-releasing hormone (GRH) is released by the hypothalamus +2
shakakaka  *GnRH +1
dlakaswnd  ffffff.. the way they worded question was so confusing. +



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