Thyroid Disorders Flashcards
Describe the etiology of goiter
Describe the presentation of goiter
Describe the diagnostics for goiter
Describe the treatment of goiter
What are the actions of T3 & T4
- increase basal metabolic rate & metabolism
- stimulate bone maturation & growth
- ensure proper fetal growth & development (esp CNS)
- increase cardiac output
What meds can suppress TSH
high dose steroids, dopamine
What meds can increase TSH
metoclopramide & amiodarone
Describe when to do thyroid screening
- newborn (screen for congenital hypothyroidism ( cretinism, intellectual disability))
- sometimes in pregnancy
- high index of suspicion in elderly pts
- if symptomatic
- when titrating certain meds (or when using amiodarone, Li, metoclopramide)
Describe the screening for thyroid conditions
TSH first (if normal, no further testing)
- if high: free T4, maybe T3 (if sus for hyperthyroidism)
- if low: free T4 & T3
Describe the difference between total vs free T3 & T4
Total: highly protein bound, many factors influence binding
Free: corresponds to biologically available hormone pool, unpound
Describe the consideration for biotin (Vit H, B7) in thyroid testing
- can impact TSH results
- stop at least 18 hrs prior to blood draw
Dx for high TSH & low Free T4
primary hypothyroidism (thyroid failure)
Dx if TSH is high but FT4 is normal
subclinical hypothyroidism
Dx if TSH is low & FT3/FT4 are high
primary hyperthyroidism (thyroid overproducing)
Dx if TSH is low and FT3/FT4 are normal
subclinical hyperthyroidism
Dx if TSH is low and FT4 is low
Central/Secondary hypothyroidism (pituitary failure)
Dx if TSH is high and FT3/FT4 are high
Central/Secondary hyperthyroidism (TSH producing tumor)
Which labs test for Hashimoto’s
- Anti-Tg
- Anti-TPO (also Graves
- TSH receptor antibody (blocking in hashimoto’s)
Which labs test for Grave’s disease
- Anti-TPO (also hashimoto’s)
- Antimicrosomal antibody
- TSH receptor antibody (stimulating in Grave’s)
Describe radioactive iodine uptake scans
- done in hyperthyroidism or nodule workup
- iodine collects in thyroid gland
- overactive/nodule takes up more iodine
Describe the appearance of the thyroid in a radioactive iodine uptake scan in Grave’s
symmetrical high uptake
Describe the appearance of the thyroid in a radioactive iodine uptake scan in thyroiditis
symmetrical low uptake (underfunctioning, usually not ordered for this)
Describe the appearance of the thyroid in a radioactive iodine uptake scan in Toxic MNG or Toxic adenoma
irregular/uneven increased uptake
Describe thyrotoxicosis
state of excess thyroid hormone (from gland, meds, etc?)
When is it important to include a T3 in workup of the thyroid?
when HYPERthyroidism is suspected
Describe the course of postpartum thyroid conditions
- hyper or hypo
- 2-4 weeks of thyrotoxicosis
- 4-12 weeks of hypothyroidism
- spontaneously resolves
- can treat symptomatically or with short term levo when in hypothyroid phase
Describe the thyroid considerations prior to surgery
- if hyperthyroidism: achieve euthyroid prior
- if hypothyroidism: proceed if taking meds regularly
Describe the etiology of goiter
Describe the etiology of hyperthyroidism
Describe the presentation of hyperthyroidism
Describe the labs for hyperthyroidism
Describe the etiology of Grave’s disease
Describe the triad presentation of hyperthyroidism
Describe the diagnostics for grave’s
What is this a typical presentation of
Graves disease
Describe the etiology of a thyroid storm
Describe the presentation of a thyroid storm
Describe the labs for a thyroid storm
Describe the treatment of a thyroid storm
Describe the etiology of toxic MNG
Describe the presentation of toxic MNG
Describe the etiology of toxic adenoma
Describe the workup for toxic MNG & toxic adenoma
Describe the treatment for toxic MNG
Describe the etiology of hypothyroidism
Describe the presentation of hypothyroidism
Describe the treatment of hypothyroidism
Describe the workup of hypothyroidism
Describe the etiology of thyroiditis
Describe the presentation of viral thyroiditis
Describe the labs for viral thyroiditis
Describe the treatment for viral thyroiditis
Describe the etiology of hashimoto’s thyroiditis
Describe the labs for hashimoto’s thyroiditis
Describe the etiology of myxedema coma
Describe the presentation of myxedema coma
Describe the treatment of myxedema coma
Describe the etiology & presentation of euthyroid sick syndrome
What is important to check in euthyroid sick syndrome
reverse T3
What is the most common endocrine cancer
thyroid cancer
What are the worst and chillest thyroid neoplasms
Worst: anaplastic carcinoma
Chillest: papillary or follicular carcinoma
What is this characteristic of
Hypothyroidism
What is this characteristic of
hyperthyroidism
Describe the treatment of toxic adenoma
may develop hypothyroidism after tx
Describe the treatment for hyperthyroidism
Describe the workup of goiter
Describe the treatment of goiter