7. Endocrine Flashcards
(34 cards)
Hormone Physiology Pathoway
Thyroid/Adrenal/Overies
Thyroid
- TRH (HypoThalamus) -> TSH (Pituitary) -> T3/4 (Thyroid gland)
- CRH (HypoThalamus) ->ACTH (Pituitary) -> Cortisol (Adrenal gland)
- GnRH (HypoThalamus) ->FSH, LH (Pituitary) -> Overies - Estrogen, Progesterone, Testes - Testosterone
Hypo vs Hyper thyroid
Sx
Radioactive iodine test (RAIU) results
Hypo (slow)
- Cold intolerance
- Dry skin, weight gain
- Hypoactivity
- Bradycardia
Hyper (fast)
- Hot intolerance
- Wet skin, warm
- Hyperactivity
- Tachycardia
RAIU results
- Diffuse uptake - Graves (hyper)
- Decrease uptake - Thyroditis (Hypo)
- Hot nodule - Toxic adenoma
- Multiple Nodules - Toxic Multinodular goiter
- Cold Nodules - Rule out malignancy
New born infant with low thyrodism
Name/Tx
Name: Cretinism
Tx: Levothyroxine
LOW Free T3/4 + LOW TSH
Name/Dx
Name: Euthyroid Sick Syndrome
Dx: LOW free T3/4, LOW TSH
Hypermetabolic state (fever, tachycardia, A Fib)
Name/Dx/Tx/Overdose
Name: Thyroid Storm
Dx: TSH low, T3/4 high
Tx: Propanolol -> PTU(methimazole) -> Iodine -> hydrocortisone
Overdose: BB + Dexamethasone
Bradycardia + hypoglycemia + hyponatremia
Name/Dx/Tx
Name: Myxedema crisis
Dx: HIGH TSH, LOW T3/4
Tx: IV Levothyroxine
Thryoid bruit + Lid lag + exophthalmos
Name/Dx/Tx
Name: Grave’s disease
Dx
- TSH LOW, T3/4 High
- Thyroid stimulating ab +
- RAIU - Diffuse uptake
Tx
- Iodine (MC)
- Methimazole/PTU
- Propanolol
Enlarge thyroid + but no eye or skin change + Dysphagia
2 possible Name/Dx/Tx
Name: TMG (Toxic multinodular goiter)
Dx
- LOW TSH, HIGH T3/4
- RAIU - Patchy area high and low uptake
Name: TA (Thyroid adenoma)
Dx
- LOW TSH, HIGH T3/4
- RAIU - Local high uptake (Hot nodule)
Tx: Iodine, PTU (preferred in pregnancy)
Difficulty swallowing due to enlarge thyroid + Cold Nodule
Name/Risk/PE(benign vs maligancy)/Dx/Tx
Name: Thyroid Nodule
Risk: age 60 or more
PE
- Benign: smooth, firm
- Maligant: rapid growth, fixed in place, no movement with swallowing
Dx
- FNA with biopsy
- RAIU - cold nodule (highly suspicious for malignancy)
Tx
- Surgery
- Observation
Thyroid Ab present + High TSH, LOW T3/4
Name/Dx/Tx
Name: Hashimoto’s thyroditis
Dx
- Thyroid ab presents
- HIGH TSH, LOW T3/4
Tx: Levothyroxine
Painful Tender Neck thyroid
Name/Cause/Dx/Tx/
Name: de QUERVAIN’s Thyroiditis
Cause: Post Viral infection
Dx: ESR high + No Thyroid Ab
Tx: ASA
Thyroid Carcinoma type/Risk/MET/Tx
- Papillary (MC)
- Risk: hx of acne, radiation exposure
- MET: Cervical lymph node
- Tx: thyroidectomy
- Follicular
- Risk: hx of radiation exposure
- MET: distant METS (lung, brain)
- Tx: Thyroidectomy
- Medullary
- Risk: Not related with radiation exposure, associated with MEN2
- Tx: Thyroidectomy
- MET: early cervical lymph, later distant (lung, brain)
- Anaplastic
- Risk: hx of radiation exposure
- MET: Trachea
- Tx: chemo, No surgery
- Most aggresive/poor prognosis
Stones, bones, abdominal, groans, psychic moans
Name/MC cause/PE/Dx/Tx
Name: Hyperparathyroidism
MC cause: Parathyroid adenoma
PE: decrease DTR
Dx: Serum Increase calcium + increase PTH + decrease Phophate
Tx: Surgery
hx of thyroid surgery + Trousseau’s & Chvostek’s sign
Name/Dx/Tx
Name: Hypoparathyroidism
Etio: hx of thyroid surgery
Dx: Low calcium, Low PTH, High Phosphate
Tx: Calcium supplementation & Vitamin D
Prolonged QT interval + chvostek sign
2 type Name/Dx/Tx
2 type of hypocalcemia
- Hypocalcemia + PTH low - MC hypoparathyroid
- Hypocalcemia + PTH high - Vit D deficiency
Dx: Ca low + ECG - Prolong QT interval
Tx
- Calcium gluconate IV - Severe
- PO calcium + Vitamin D - mild
Shortened QT interval + kidney stone + bones
2 type Name/Dx/Tx
Name
- Primary Hypercalcemia - High PTH, Low phosphate
- Malignancy Hypercalcemia - Low PTH
Dx: Ca low + Shorten QT interval
Tx
- Mild - No treatment needed
- IV saline + furosemide (1st)
- HCTZ avoid
- calcitonin, bisphonates (severe)
Post menopausal women + frequent fx + loss of vertebral height
Name/2 Major cause/Dx/Tx
Name: Osteoporosis
2 Major Cause
- Menopause
- prolonged use of corticosteroid
Dx: Dexa scan (2.5 below osteoprosis, 1.0-2.5 ostepenia)
Tx: Bisphosphonate (alendronate) + Vit D
Spontanous fx in childhood
Name/Other sx
Name: Osteogenesis Imperfecta
Other sx: Blue tinted sclera, presenile deafness
Long bone bowing or fontanel closure delay
2 type Name/Dx/Tx
Name
- Osteomalacia - bowing bone + adult
- Rickett - fontanel delay closure, growth delay
Dx: Vit D low, Ca low, Phosphate low, Alkaline high
- X-ray: looser line
Tx: Vit D
Ca low, Phosphate high + bone pain
Name/Dx/Tx
Name: Renal osteodystrophy
Dx: Lab PO4 high + Ca low
- X-ray (salt and paper appearance of the skull)
- Cystic brown tumor on biopsy
Tx: Phosphate binder + Vit D
Hyperpigmentation + hx of corticosteriod usage
2 type name/Lab value/Dx/Tx
Name: Chronic Adrenocortical insufficiency
- Primary (addison) - Adrenal gland destruction
- Secondary - exgenous steriod use MC
Lab: Hyponatremia + Hyperkalemia + Metabolic Acidosis
Dx
- ATCH @ 8am initial screening test (Normal - increase cortisol, No increase cortisol means addision possible)
- CRH given if low cortison to find any pituitary vs adrenal
- ACTH rise + cortisol low (ACTH works so this is adrenal problem)
- ACTH low + cortisol low (No effect on ACTH means pituitary problem)
Tx: Glucocorticoid (Hydrocortisone) + Mineralocorticoid (Fludrocortisone)
Shock (low BP, hypovolumia) + hx of abruptive withdrawal of glucocorticoids
Name/Dx/Tx
Name: Acute adrenal crisis
Dx: HyperK, HypoNa, Hypogly
Tx: IV normal saline + IV Corticosteriod
Moon facies, buffalo hump
Name/Sx/Dx/Tx
2 type name
- Cushing syndrome - cortisol excessive
- Cushing disease - pituitary adenoma
Sx: Moon facies, buffalo hump, central obesity, wasting extremities, belly striae
Dx: Screening initial
- Dextametasone test (should be supressed cortisol level which means normal)
- Cortisol collecting (24 hrs urine)
- Salivary cortisol
If initial test is positive then go for Plasma ACTH Level check
- ACTH level low - Adrenal adenoma or carcinoma
- ACTH level normal high - Pituitary adenoma or Ectopic
- High dose dexamethasone suppressing test (Dex supress the ACTH -> low cortisol (normal))
- if high Dose DM does not effect - ectopic
- if high Dose DM supress - Pituitary adrnoma
- High dose dexamethasone suppressing test (Dex supress the ACTH -> low cortisol (normal))
Tx
- Cushing disease - transsphenoidal surgery
- Ectopic ACTH tumor - tumor remove
- Iatrogenic steriod therapy - Gradual tapering
HTN + hypoK + polyuria
Name/Dx/Tx
Name
- 1° Hyperaldosteronism - idiopathic
- 2° Hyperaldosteronism - Renal artery stenosis
Dx
- Lab: HypoK
- Renin ratio screening: ARR>20, Plasma aldosterone>20
- Saline infusion test (Definitive)
Tx
- Spironolactone
- Angioplasty