Endocrinology Flashcards
dz of adrenal gland -> insufficient cortisol
adrenal insufficiency/primary addison’s
4 causes of addison’s
autoimmune - mc
TB
thrombosis/hemorrhagic
malignancy
rifampin/barbs/phenytoin/ketoconazole
seondary addison’s is causd by (2)
decreased ACTH:
-exogenous steroids - mc
-hypopituitarism
-pituitary adenoma
dx for addison’s
- 8 am serum cortisol and plasma ACTH/ACTH stimulation test
- CRH stimulation test
- adrenal abs
- CXR for TB
high ACTH, low cortisol:
low ACTH, low cortisol:
primary addison’s
secondary addison’s
with CRH stimulation test ->
high ACTH, low cortisol:
low ACTH, low cortisol:
high ACTH, low cortisol: primary addison’s
low ACTH, low cortisol: secondary addison’s
CT of adrenals shows enlarged adrenals with calcification
secondary addison’s due to TB
atrophied adrenals on CT
autoimmune adrenal insufficiency
CT shows bilateral adrenal hyperplasia
genetic enzyme defect
tx for addison’s
hydrocortisone + mineralocorticoid
what med is only used for primary addison’s
fludrocortisone
5 causes of hyperthyroidism
graves dz (autoimmune) - mc
toxic adenoma
thyroiditis
pregnancy
amiodarone
3 PE findings of graves dz
diffuse goiter
bruit
pretibial myxedema
3 sx of thyroid storm
fever
tachycardia
delirium
dx for hyperthyroidism (3)
TSH
T4
RAIU
RAIU findings of graves vs toxic multinodular
graves: diffusely high uptake
toxic multinodular: discrete areas of high uptake
abs associated w. graves
anti-thyrotropin
tx for hyperthyroidism
bb
methimazole vs PTU
radioactive iodine
thyroidectomy
mc complication of thyroidectomy
recurrent laryngeal nerve damage
management of hyperthyroidism in pregnancy
1st trimester: PTU
after 1st trimester: methimazole
BF’ing: methimazole
complication of prolonged exposure to excess cortisol
cushing’s syndrome
ACTH secreting pituitary microadenoma -> excess cortisol
cusing dz
sx of hypercortisolism (lots!)
obesity
moon facies
supraclavicular pads
HTN
excessive thirst
polyuria
hypokalemia
proximal m weakness
pigmented striae
backache
HA
oligomenorrhea/amenorrhea
ED
emotional ability/psychosis
dx for cushing’s
- 24 hr urine free cortisol - most reliable vs late night serum cortisol
- ACTH level
- low dose dexamethasone test
indication for brain MRI in cushing’s work up
high ACTH -> look for pituitary adenoma (cushing dz)
ACTH dependent cause
in cushing’s work up, if ACTH is low, you should order
adrenal CT
ACTH independent cause
how does the dexamethasone suppression test work
- give dexamethasone
- failure to decrease cortisol = diagnostic
- give high dose dexamethasone suppression test
- no suppression = cushing syndrome
tx for cushing dz
transsphenoidal selective resection of pituitary tumor
+/- xrt
4 causes of hypothyroidism
hashimoto’s
thyroidectomy
iodine ablation
congenital
low free T4, elevated TSH
primary hypothyroid
low free T4, low/normal TSH
secondary hypothyroid
normal T4, elevated TSH
subclinical hypothyroid
deficiency of/resistance to vasopressin (ADH) -> decreased ability of kidneys to reabsorb water -> massive polyuria
diabetes insipidus
2 types of diabetes insipidus
central
nephrogenic
deficiency of ADH from posterior pituitary/hypothalamus
central diabetes insipidus
mc type of diabetes insipidus
central
6 causes of central diabetes insipidus
idiopathic
autoimmune destruction of pituitary
head trauma
brain tumor
infxn
sarcoidosis
diabetes insipidus due to partial/complete insensitivity to ADH
nephrogenic diabetes insipidus
4 causes of nephrogenic diabetes insipidus
lithium, amphotericin
hypercalcemia
hypokalemia
ATN
serum/urine osmolality findings of diabetes insipidus
high serum osmolality
low urine osmolality
water leaks uncontrollably from serum into kidneys
dx for diabetes insipidus
water deprivation test
desmopressin stimulation test
what is the water deprivation test
most sensitive/reliable for diabetes insipidus:
continued production of dilute urine despite water deprivation
findings of desmopressin stimulation test: central vs nephrogenic diaetes insipidus
central: reduction in urine output -> indicates response to ADH
nephrogenic: continued production of dilute urine -> no response to ADH
tx for diabetes insipidus: central vs nephrogenic
central: desmopressive/DDAVP
nephrogenic: Na and pro restriction, hctz, indomethacin
mc seen in T2DM
hyperglycemia -> high osmolarity in absence of ketoacidosis
nonketotic hyperglycemia
4 sx of nonketotic hyperglycemia
over days to weeks
altered consciousness
dehydration/weakness/muscle cramps
vision problems
3 causes of nonketotic hyperglycemia
acute infxn
glucocorticoids, diuretics
nonadherence to DM meds
5 complications of nonketotic hyperglycemia
sz
DIC
ARF
ARDS
rhabdo
dx for nonketotic hyperglycemia (3)
BG > 600
osmolarity > 320
pH > 7.3
tx for nonketotic hyperglycemia (4)
IV NS
IV insulin for slow decline in BG
LMWH
K+ replacement
consequence of rapid BG reduction in nonketotic hyperglycemia
cerebral edema
target plasma BG in acute tx for nonketotic hyperglycemia
250-300
which type of pancreatic cell produces insulin
B cells
abs associated w. T1DM
insulin
islet cells
glutamic acid decarboxylase
dx for T1DM
-BG > 200 + sx
-fasting BG > 126 on more than one occassion
-A1C > 6.5
dx for T2DM
-random BG > 200 + sx
-fasting BG > 126 on more than one occassion
-A1C > 6.5
- > 200 on OGTT
gs dx for GDM
BG > 200 on OGTT
diagnostic criteria fro preDM
-A1C 5.7-6.4
-fasting BG 100-125
-2 hr OGTT 140-199
DM meds
metformin
sulfonylureas
thiazolidinediones
alpha-glcosidase inhibitors
meglitinides
GLP-1 agonists
DPP-4 inhibitors
SGLT2 inhibitors
insulin
2 mc s.e of metformin
lactic acidosis
GI
metformin is contraindicated for GFR < _ and not recommended w. GFR _
contraindicated: GFR < 30
not recommended: GFR 30-45
recs for metformin when using contrast
stop 24 hr prior
resume 48 hr after
d/c if Cr > 1.5
what DM med stimulates pancreatic beta cell insulin release (secretagogue)
sulfonylureas:
glyburide, glipizide, glimepiride
major s.e of sulfonylureas
hypoglycemia
what DM med increases insulin sensitivity in peripheral receptor site adipose/muscle
has no effect on pancreatic cells
thiazolidinediones:
proglitazone, rosiglitazone
major contraindication for thiazolidinediones
CHF
also liver dz, weight gain
what DM med works by delaying intestinal gluose absorption
alpha-glucosidase inhibitors
acarbose, miglitol
s.e of alpha glucosidase inhibitors
GI
how do meglitinides work (repaglinide, nateglinide)
stimulate insulin release
s.e of meglitinides
hypoglycemia
what DM med works by lowering BG by mimicking incretin and increasing insuling secretion/decreasing glucagon/slowing gastric emptying
GLP-1 agonists:
exanatide, dulaglutide, semaglutide, liraglutide
s.e of glp-1’s
GI
which DM med works by increasing circulating amt of GLP1
DPP-4 inhibitors
sitagliptin, saxagliptin
risk of dpp-4 inhibitors
increased risk of HF
which DM med lowers renal glucose threshold and increases urinary gluose excretion
SGLT2 inhibitors:
canafliflozin
s.e of SGLT2 inhibitors
vaginal candidiasis
UTI
bone fx
lower limb amputations
AKI
DKA
2 added benefits of sglt2 inhibitors
wt loss
reduced CVD mortality
indication to start insulin
A1C > 9
progression of DKA
insulin deficiency -> hyperglycemia -> dehydration -> ketonemia -> metabolic acidosis -> hypokalemia
PE findings of DKA
tachycardia/tachypnea
hypotn
decreased skin turgor
fruity breath
kussmaul respirations
what are kussmaul respirations
consistent rapid, deep breathing
labs indicative of DKA
BG > 250
pH < 7.3
bicarb < 18
plasma ketones
+/- hyperkalemia
tx for DKA
IVF
regular insulin
K+
severe: bicarb
5 types of thyroiditis
hashimoto
postpartum
subacute (quervain’s)
drug induced
infectious
difference btw hashimoto and suabacute thyroiditis
neck tenderness + recent viral infxn = subacute
PE finding of hashimoto thyroiditis
goiter
lab finding of hashimoto thyroiditis
anti-TPO abs
tx for hashimoto thyroiditis
euthyroid: no tx
preexisting hypothyroid: lifelong T4 replacement
postpartum thyroiditis must be w.in _ after giving birth
2-12 mo
mc cause of thyroid pain
quervain’s thyroiditis (subacute)
inflamed, painful thyroid, fever, muscle aches
subacute/quervain’s thyroiditis
hx clues for subacute thyroiditis
recent viral infxn w. fever, myalgia, pharyngitis
lab findings of subacute thyroiditis
early: hyperthyroid
late: hypothyroid
increased ESR
drugs associated w. thyroiditis
methiamazole/PTU
lithium
amiodarone
interferon alpha
tyrosine kinase inhibitors (sunitinib)
checkpoint inhibitors (nivolumab/pembrolizumab)
management of drug induced thyroiditis
T4 asap
check TSH q 6-12 hr
2 pathogens mc associated w. infectious thyroiditis
staph
strep
thyroiditis + fever/heat/pain/swelling PLUS elevated WBC
infectious thyroiditis
causes of painful thyroiditis
subacute (quervain’s)
infectious
radiation
trauma
4 causes of non painful thyroiditis
postpartum (2-12 weeks)
drug-induced
hashimoto
fibrous
3 lab findings of thyroiditis
elevated ESR -> subacute
elevated WBC -> infectious
eleated anti TPO abs -> hashimoto
tx for subacute and postpartum thyroiditis
-usually self resolve
-pain management
-bb
-T4
when you see drug induced thyroiditis, think (2)
amiodarone
lithium
causes of heat intolerance
hyperthyroidism
amphteamines/stimulants
anticholinergics
caffeine
menopause
MS
fibromyalgia
DM
hypothalamic tumors
causes of cold intolerance
anemia
anorexia
raynaud
chronic illness
hypothyroidism
hypothalamus pathology
fibromyalgia
3 tremors to know
parkinson’s
wilson’s
essential
physiologic
intention (kinetic)
what are the 3 resting tremors
parkinson’s
wilson’s
severe essential
causes of postural/action tremor
stress/fatigue/anxiety
hypoglycemia
thyrotoxicosis
pheochromocytoma
steroids
etoh w.d
caffeine
many meds
tremor + peripheral neuropathy
charco-marie-tooth syndrome
kinetic tremor is related to _ dysfunction
cerebellar
6 causes of intention (kinetic) tremor
MS
trauma
tumor
vascular dz
wilson’s
drugs/toxins - mercury
postural tremor of hands or head that is worsened by stress - occurs at any age
essential tremor
2 types of essential tremors
intention/action
postural
shaking occurs w. simple tasks like tying shoelaces, handwriting, shaving, holding hands against gravity
intention/action tremor
_ are spared with essential tremors
legs
essential tremor is improved with
etoh
mc cause of essential tremor
genetic - autosomal dominant
tx for essential tremor
propranolol
also: primidone, alprazolam, topiramate, gabapentin
33 yo F, diffuse pain/fatigue, bones and muscles diffusely hurt, abd pain, trouble focusing
hyperparathyroidism
progression of hyperparathyroidism
- increased PTH -> bone breakdown -> elevated Ca
- kidneys retain Ca and vit D
- intestines absorb more Ca -> elevated serum Ca
types of hyperparathyroidism
-primary: parathyroid adenoma
-secondary: physiologic response to hypocalcemia, vit D deficiency
mc cause of secondary hyperparathyroidism
CKD
5 sx of hyperparathyroidism
stones
bones
abd groans
psych moans
fatigue overtones
lab findings indicative of hyperparathyroidism
elevated Ca
elevated PTH
decreased phos
2 UA findings of hyperparathyroidism
hyperphosphaturia
hypercalciuria
tx for hyperparathyroidism: primary vs secondary
primary: surgery - removal of 3.5 glands
secondary: vit D/Ca supplementation
very high Ca: IVF, lasix, calcitonin, bisphosphanates
2 types of amenorrhea
primary
secondary
primary amenorrhea is no menses by _ yo with an absence of secondary sex characteristics
OR
by _ yo w. normal growth of secondary sex characteristis
13
15
causes of primary menses
pregnancy
imperforate hymen
turner syndrome (dysgenesis)
HPO axis abnl
anorexia
bulimia
wt loss
exercise
secondary amenorrhea is absence of menses for _ mo in women w. previously normal menstruation,
OR
_ mo in a woman w. a hx of irregular cyles
3
6
mc cause of amenorrhea
pregnancy
ascending infxn that ascends from the cervix or vagina to the endometrium and/or fallopian tubes
PID
2 mc pathogens associated w. PID
GC
CT
what is chandelier’s sign
cervical motion tenderness -> PID
3 complications of PID
infertility
ectopic
tubo-ovarian abscess
dx for PID
abdominal tenderness, cervical motion tenderness, and adnexal tenderness
PLUS 1 or more:
temp > 38
WBC > 10,000
pelvic abscess
tx for PID: inpt vs outpt
outpt: ceftriaxone + doxy +/- metro
inpt: doxy + cefoxitin OR cefotetan x 48 hr, followed by doxy
indications for inpt tx w. PID
severely ill/vomiting
dx uncertain
ectopic/appendicitis can’t be ruled out
pregnancy
pelvic abscess suspected
HIV
failed outpt tx
excessive uterine bleeding w. no organic cause
dysfunctional uterine bleeding
types of dysmenorrhea
menorrhagia
metorrhagia
menometrorrhagia
polymenorrhea
oligomenorrhea
prolonged/heavy uterine bleeding
regular intervals
menorrhagia
variable amt of bleeding
irregular, frequent intervals
metrorrhagia
more blood loss during menses
frequent irregular bleeding btw menses
menometrorrhagia
menses that occur more frequently (< 21 days)
polymenorrhea
menses that occur less frequently (> 35 days)
oligomenorrhea
what types of dysfunctional uterine bleeding to uterine lesions cause (2)
menorrhagia
metrorrhagia
uterine lesions include (6)
endometrial ca/sarcoma
endometrial hyperplasia
submucosal fibroid
endometrial polyps
endometritis
adenomyosis
blood disorders associated w. dysfunctional uterine bleeding (4)
vWD (von willebrand)
prothrombin deficiency
leukemia
severe sepsis
which types of dysfunctional uterine bleeding is hypothyroidism associated w. (2)
menorrhagia
metrorrhagia
which 2 types of dysfunctional uterine bleeding is hyperthyroidism associated w. (2)
oligomenorrhea
amenorrhea
continuous unopposed production of estradiol 17 beta causes
anovulatory dysfunctional uterine bleeding:
continuous proliferation of endometrium w.o corpus luteum -> sloughs off in irregular pattern
LH surge is associated w. what type of dysfunctional uterine bleeding
mid cycle spotting
gs dx for dysfunctional uterine bleeding
dilation and curettage
diagnostic and therapeutic
_ can be used acutely if pt presents w. hemorrhage due to DUB
IV estrogen
_ reduce menstrual blood loss
NSAIDs
dysmenorrhea prior to menses, not relieved by NSAIDs or OCPs
dyspareunia
endometriosis
2 types of dysmenorrhea
primary
secondary
primary menorrhea begins w.in _ to _ mos of menarche
6-12
dysmenorrhea is due to excess _ production (2)
PG
leukotriene
-> increased uterine contraction
describe pain w. dysmenorrhea
begins w. start of menses
lasts 2-3 days
worst on day 1
3 sx associated w. dysmenorrhea
ha
nausea
diarrhea
painful menstruation caused by clinical identifiable cause
secondary amenorrhea
causes of secondary amenorrhea (lots!)
endometriosis
adenomyosis
polyps
fibroids
PID
IUD
tumors
adhesions
cervical stenosis/lesions
psych
describe pain w. secondary menorrhea
pain begins mid cycle
increases in severity til the end
mc age for secondary dysmenorrhea
20-40
top 2 locations for ectopic pregnancy
- fallopian tubes
- ampulla of tube
3 hallmark findings of ectopic
abd pain
bleeding
adnexal mass
mc cause of ectopic
occlusion of tube 2/2 adhesions
6 rf for ectopic
previous ectopic
previous salpingitis
previous abd/tubal surgery
IUD
assisted reproduction
smoking
5 sx of ruptured ectopic
severe abd pain or shoulder pain
peritonitis
tachycardia
syncope
orthostatic hypotn
dx for ectopic
b hcg > 1,500 w. no fetus in utero on US
when bHCG > _ there should be evidence of developing intrauterine gestation on US
1,500
hallmark US finding of ectopic
ring of fire (ring of vascularity)
hypervascular lesion w. peripheral vascularity
what is this showing
ring of fire -> ectopic
indications for MTX for ectopic
b HCG < 5,000
ectopic mass < 3.5 cm
no FHR
hemodynamically stable
no blood d.o
no pulm. dz
no peptic ulcer
normal renal fxn
normal hepatic fxn
compliant pt
contraindications for MTX for ectopic (3)
bf’ing
active pulm dz
immunodeficiency
moa for MTX
folic acid antagonist -> inhibits DNA replication
indications for emergent laparoscopy salpingostomy for ectopic
rupture
MTX contraindicated
premature separation of all/sections of otherwise normally implanted placenta from uterine wall after 20 weeks gestation
placental abruption
mc cause of third trimester bleeding
placental abruption
5 rf for placental abruption
trauma
smoking
HTN
preeclampsia
cocaine
painful 3rd trimester bleeding is always _ until proven otherwise
placental abruption
dx for placental abruption
clinical…always
US findings of placental abruption
retroplacental blood collection
PE finding of placental abruption
blood stained amniotic fluid in vagina
_ indicate fetal hypoxia/bradycardia
decelerations
tx for placental abruption (5)
delivery
type and match
coag studies
large bore IV
steroids
management of small placental abruptions
expectant management
endometriosis is mc found in the (2)
ovary
peritoneum
t/f: the severity of endometriosis sx does not equate to severity of dz
t!
endometriosis is most likely caused by
retrograde menstruation: endometrium floats back out of fallopian tubes into ovary
rf for endometriosis
early menarche
short cycles
heavy/prolonged cycles
mullerian anomalies
fam hx
autoimmune dz
3 factors that decrease risk for endometriosis
multiparity
longer lactation
regular exercise
3 d’s of endometriosis
dyspareunia
dyschezia
dysmenorrhea
PE finding of endometriosis
uterus is fixed and retroflexed
tender nodularity of cul de sac/uterine ligaments
gs dx for endometriosis
pelvic laparoscopy and bx
laparascopy findings of endometriosis
chocolate cysts
tx for endometriosis (5)
endometrial resection
NSAIDs
progestins/OCPs
danazol
GnRH agonist
max duration of tx w. danazol
6 mos
risk for bone loss after
increasing intake of _ can decrease risk of endometriosis
omega 3
placental lies very low in the uterus -> covers all or part of the cervix
placenta previa
painless third trimester bleeding is always _ until proven otherwise
placenta previa
5 types of placenta previa
complete
partial
marginal
low-lying
vasa previa
6 fetal complications associated w. placenta previa
preterm delivery
PPROM
intrauterine growth restrition
malpresentation
vasa previa
congenital abnl
4 rf for placenta previa
prior c section
multiple gestations
multiple induced abortions
advanced maternal age
dx for placenta previa
transvaginal US
what PE test is contraindicated in placenta previa
pelvic exam
management of placenta previa (4)
strict pelvic rest
+/- transfusion
c section
rhogam
preferred delivery for placenta previa
c section
3 types of fetal monitoring
non stress
contraction stress test
APGAR