Endocrinology, Diabetes, Metabolism 9% Flashcards
Screen for pituitary-gonadal axis
LH, FSH
Screen for pituitary-adrenalaxis
ACTH
Most sensitive determinant of pituitary fxn?
FSH, LH level
Screening for Acromegaly
IGF-1 (not GH because of pulsatile release)
CT head shows 0.8cm solid mass in pituitary. The - pt nulliparus, menustration regular. Next step?
Check all axises
- prolactin
- thyroid: T4, TSH, IGF-1
- Cushings: 1mg DMS test
Things that increase prolactin
Nipple manipulation Phenothiazines reserpine Mehydopa estrogens marijuana prgenancy hypothyroid
Prolactinoma
Prolactin >200 - macroadenoma <200 = micro tx:bromocryptine if elevted <100 and NO SX = OCP –> f/u mri if size >1cm -> q 6 months w/ visual field testing <1cm q yearly
Middle aged woman wit dec libiddo adn fatigue test low, FSH low
check prolactin adn TSH
Pt wit galactorreha wtd?
check TSH and prolactin
Young woman with galactorreha on manipulation of nipple, TSH/prolactin normal
avoid manipulation of nipple
35yo F with galactorreha and amenorrhea x 6 months - preg neg prolactin 184 TFT normal wtd?
MRI r/o stalk tumor
Pt post partum continues to have galactorrhea fter finishing nursing baby - TSH 2.8, prolactin 281 takes no meds - dx?
prolactinoma - check MRI
45yo M c/o fatigue and dec libido - testosterone 18, prolactin 2500 FSH 2.2 cause?
prolactinoma
Pt with prolactinoma micro or macro - wants to concive
start dopamin agonist (bromocryptine - reduce prolactin level and induce ovulation
Pt tx’d with bromocryptine for macroadenoma and gets pregnant wtd?
d/c bromocryptine monitor visual fields - only restart if changes
Acromegaly
inc’ing shoe size, hat size, ring size, hyperglycemia, prominent jaw, wide space between teeth, big tongue, flshey palms soles, osteoarthritis changes on Xray
Screening test for acromegaly
IGF-1 (somatosatin C) - also to follow dz activity
Confirm acromegaly (after IGF-1 screening) with…
oral glucose suppression test failure to suppress GH to <2ng after 100g glucose
Tx for Acromegaly
Transphenoid surgery
Complciations of acromegaly
HTN, LVH, CHF, OSA, colonic polyps, carpel Tunnel
DM
dx FBS>126 - repeat x 1 to confirm HgA1c>=6.5 Random blood sugar >200 with sx 75g gluc load GTT >200
Pt with BP 135/80 or BMI 25 or sedentery lifestyle or >40 yo wtd?
FBG –> screen for DM (FSG, HgA1c)
Pt with DM (FSG >126) at risk for
DM and retinopathy, nephropathy
DM I vs II
check for Ab vs glutamic acid carboxylase, ab to islet cells