Endocrino Flashcards
++ sx but not very high prolactin ?
++ PRL but not very many sx ?
Hook effect : lab peculiarity where veyr high levels of PRL are read as low levels : dilute the sample
Macroprolactin : surestimation
1mg dex suppression test positive ?
Cortisol > 140
20F with early onset HTN. She had low potassium at time of diagnosis of HTN. She is on amlodipine and an OCP. Her creatinine and K are now normal. Aldo:Renin 160 (<80 is normal). What do you do next?
a) Repeat ARR off amlodipine
b) Repeat ARR off OCP
c) Repeat ARR on both amlodipine and OCP
d) 24h urine aldo collection
a) Repeat ARR off amlodipine
OCP affects Renin concentration but not the Renin activity (what is measured), amlodipine leads to false neg.
8MG DEX signification in cushing syndrome ?
- if 8mg dex suppresses am cortisol : cushing due to pituitary cause
ORDER MRI SELLA - if 8mg does not suppress cortisol : ectopic ACTH
ORDER CT the chest of malignancy
A 34 year-old woman with Graves disease, who has been euthyroid on methimazole 5mg PO daily for the past year, recently tested positive for pregnancy. She is referred for thyroid management in pregnancy. Which of the following is NOT appropriate?
a) Discontinue all anti-thyroidal medications to avoid teratogenicity
b) Check thyroid function tests every 4 weeks during pregnancy
c) Switch to PTU 300mg PO BID and continue until GA 16 weeks
d) Check TRAb titre immediately and check again at GA 18-22 weeks
Switch to PTU 300mg PO BID and continue until GA 16 weeks
Switching is an option but too high of a dose based on 1MMZ:20PTU conversion
TraB should be checked as low titres in early pregnancy can help predict successful withdrawal of ATD
Adrenal incidentaloma : suggestive of malignancy ?
- Size over 4cm
- Hounsfield Units > 10
- < 50% delayed contrast washout
- Calcifications, extension, ADP
- Hx of malignancy
Alternatives neuroleptics not associated with weight gain ?
Aripiprazole
Ziprasidone
Lurasidone.
Amenorrhea with high FSH and low estradiol : dx ?
Primary ovarian insufficiency
Anticonvulsants and BB associated with weight gain ?
Valproate, carbamazepine, GABAPENTIN
Propanolol
Associated illness in Paget disease ?
Hearing loss, compressive neuropathies, osteoarthritis, osteosarcoma
Chronic liver disease on A1C ?
Decreased
CI to GLP1 ?
Personal or family history of medullary thyroid cancer or MEN 2
Hx or pancreatitis or pancreatic cancer
Contraindications to RAI tx in Graves disease ?
Pregnancy, breatsfeeding, mod-sev orbitopathy, thyroid cancer
Delay pregnancy for 6 months after tx
Criterias for surgical management of hyperparathyroidism ? Name 7.
-Serum total calcium > 0.25 mmol/L above upper limit
-T-score <= -2.5 at L-spine, total hip, femoral neck or distal 1/3 radius
-Fractures (Vertebral only; by X-ray, CT, MRI or VFA)
-Age<50
-Urine calcium >6.25 mmol/d (>250mg/d) in women or >7.5 mmol/d in men (>300mg/d)
-Stones or nephrocalcinosis by x-ray, ultrasound, or CT
-Creatinine clearance < 60 mL/min (stage 3 CKD)
Cushing syndrome dx if ACTH high vs low ?
High or inappropriately N : pituitary adenoma or ectopic source
= PITUITARY MRI +/- IPSS if MRI N or adenoma < 6-9mm
Low : adrenal adenoma or adrenal carcinoma
= CT ADRENALS
DDX of a goiter ?
TSG in Hashimoto
Thyroid receptor antibodies in Graves
BhCG in pregnancy
Definition of nephropathy in db ?
- Random urine ACR > 20
- ACR > 2 x 2 on 3 months
- eGFR < 60 x 2 on 3 months
Diagnosis of OP clinically ?
- Fragility fracture
OR - Absolute fx risk of 20% or more over the next 10 years
Differential of acquired hypoparathyroid ?
Hypomagnesemia causes PTH resistance
Hypermagnesemia reduces PTH synthesis / secrretion
Post surgical
Infiltrative disease
Auto immune polyglandular syndrome type 1
DKA diagnosis ?
Arterial pH ≤ 7.3
Serum bic ≤ 15
AG ≥ 12
Positive serum and/or urine ketones
BG is usually ≥ 14
DLP tx : who needs add on tx ?
1) If started on LDL > 5
Add on if LDL ≥ 2.5 (or < 50% reduction) or Apo B ≥ 0.85 or non HDL C ≥ 3.4
2) if ASCVD
Add on if LDL ≥ 1.8 or Apo B ≥ 0.7 or non hDL ≥ 2.4
Does OCP affects plasma aldo/renin ratio ?
No OCP affects renin concentration but not the renin activity
Dx if virilization in women ?
Tumor related androgen production : adrenocorticocarcinoma
Epidemiology and atypical femoral fractures ?
Asian women high risk
Gestational transient thryotoxicosis associated with ? Name 4.
Hyperemesis gravidarum
Molar pregnancy
Multiple gestation
Choriocarcinoma
Glyburide and DFG ? Gliclazide and DFG ?
Glyburide avoir if DFG < 60
Gliclazide preferred but dose reduction
Grave’s orbitopathy treatment ?
Mild : artifical tears / opthalmic gels / selenium supplementation x 6 months
Mod-sev : IV gluco + MMF
Highest specificity feature for thyroid cancer on US?
Microcalfications
How can you prevent atypical femoral fractures ?
drug holiday for oral/IV biphospho for 3-6 years
How do you adjust synthroid dose in pregnancy for pre existing hypoT4 ?
Need 30-35% more LT4 : take an extra pill on saturdays and sundays
How do you diagnose FHH ?
Urine calcium : creat ratio < 0.01 so less than 1%
UCa x (creat umol/L / 1000)
Ca x UCreat mmol/L
How do you treat hypoparathyroidism ?
- Ca and active vitamin D (calcitriol or alfacalcidol)
- PTH theray can be considered if insufficient
= low calcium with low or N PTH with high PO4 and low 1,25 vit D
How do you treat secondary hyperparathyroidism ?
For CKD patients :
- vit D
- phosphate restriction
- non calcium phosphate binders
Cinacalcet if on dialysis with target PTH
How long should the patient be on denosumab before reevaluation ?
Reass after 6-10 yr
If stop at ≤ 4 doses transition to biphosphonates 6m after the last dose for 1y
If stop at ≥ 5 doses refer to OP expert as risk of rapid bone loss
How long should the patient be on teriparatide or romosozumab ?
Teriparatide x 24mo / Romo x 12 mo
then transition to antiresorptive agent
How much do you want to correct plasmatic osmolality in DKA / HHS ?
Eviter une correction trop rapide de l’osmolarité sérique : max 3 mmol/kg/h
How to clinically dx familial hypercholesterolemia ?
LDL > 5 with no secondary causes
AND 1 of three
- Positive fam hx
- Early coronary heart disease (< 65 women < 55 men)
- Physical findings
Hypercalcemia : if PTH, Ca and PO4 all high think ?
Kidney : tertiary hyperparathyroidism
Hyperparathyroidism medical management ?
- Vit D > 75
- Ca intake per nutritional guidelines
- Biphospho + denosumab to improve BMD
- Cinacalcet to reduce Ca
Hyperprolactinemia : disruption of the stalk : how high is PRL ? if prolactinoma ? if pharmacologic ?
- Prl rarely > 100 if disruption of the stalk
- If prolactinoma prl around 100
macroadénome avec PRL < 100-150 prob non sécrétant - PRL 25-100 si pharmaco sauf risperdal qui peut donner des valeurs > 200
HyperPTH : calcium and phosphate in same or opposite direction ?
Opposite direction
Hyperthyroidism TSH < 0.005 having CT scan with contrast : what should you give ?
PTU 200 po
In PCOS : LH and FSH ?
LH > FSH
Indication for bariatric surgery ?
- BMI 35-40 and 1 serious comorbidity
- BMI ≥ 40 without comorbidity
Indications for surgery in tertiary hyperpara ?
- Rrefractory hyperPTH despite vit D analogues / calcimimetics
- Hypercalcemia severe/sx
- Calciphylaxis
- Progressive bone disease
Indications for tx in Paget disease ?
- Sx
- Disease with high risk of fx
- Hyper Ca (should not happen if immobile)
- ALP > 2x ULN
- Pre orthopedic surgery
Investigation in Paget Disease ?
- Plain XRs first of suspicious areas
- If asx : skeletal surveys/series
- If dx confirmed : bone scan to determine the extent of disease
Lab pattern : FFH ?
Calcium high
PO4 low
PTH high
Ca U low < 0.01
Lab pattern in calcium : thiazides ?
Calcium high
PO4 N or low
PTH low or high if unmask primary hyperparathyroidism
Ca U low
Lab patterns : primary hyperPTH ?
High Ca
Low PO4
High PTH
High urine calcium
Lab patterns with calcium : lithium ?
Calcium high
PO4 low
PTH high
UrineCa low
LIKE FHH !
Labs in Paget disease ?
High PAL +/- bone specific ALP without other abdormalities
LDL goal :
- LDL > 5
- DM or CKD
- Intermed FRS or high FRS
- ASCVD or AAA in 2e prevention
- LDL > 5 : < 2.5
- DM or CKD : < 2
- FRS : < 2
- ASCVD/AAA : < 1.8
Male hypogonadism investigation ?
- morning fasting TT +/- free testoterone if condition that alter SHBG
- if low = LH and FSH
if high it’s primary = klinefelter
if low it’s secondary = PRL, iron sat
Measure androgen levels if normal hirsutism score ?
- do NOT measure androgen levels in women with a N hirsutism score and N menses
MEN 1?
Pituitary adenoma
Parathyroid
Pancreatic (insulin, VIP, gastrin)
MEN 2A and 2B ?
Medullary cancer and pheo
2A : + parathyroid
2B : + marfanoid, mucosal neutromas
Min DFG for DPP4i ?
If DFG < 15 OK for linagliptin 5 or sitagliptin 50
Min DFG for GLP1 ?
Limited data available if < 15