Endocrine Disorders Flashcards
What is the usual cause of T1DM?
Viral illness and immune response causing autoantibodies
Which cells are destroyed in T1DM?
Beta cells
What are the 3 criteria for prediabetes?
- Fasting glucose 100-125
- Postprandial glucose 140-199
- A1c: 5.7-6.4
T/F: does triglycerides >250 put you at increased risk for T2DM?
Yes
When should you screen for diabetes according to ADA?
a) Any overweight adult with 1+ risk factor
b) All adults 45+
c) Children with 2+ risk factors
Loss of peripheral hair can indicate what?
Atherosclerosis
What’s the ADA diabetes diagnosis criteria?
- Fasting 126+
- Random 200+
- A1C 6.5+
What is the ADA goal for DM control in terms of A1C?
7.0%
What’s the ADA goal for DM control in terms of BP?
<140/90
What’s the ADA goal for DM control in terms of fasting BS?
80-130
What’s the ADA goal for DM control in terms of random BS?
<180
If A1c is >7.5% to start, how many meds should you consider starting off the bat?
2
If A1c is >9.0% to start, what should you consider adding off the bat?
Insulin
What’s the most potent therapy for reversing DM?
Lifestyle modification
What class of drugs is metformin?
Biguanide
Does metformin reduce gluconeogenesis in liver?
Yes
Do not use metformin if estimated GFR < ____?
<30
What category of drug are glipizide and glyburide?
Sulfonylureas
GDM confers increased risk to which 2 things during pregnancy?
- Stillborn
2. Large baby
GDM confers increased risk to which 2 things during pregnancy?
- Stillborn
2. Large baby
What’s the T score for osteoporosis?
Amount of bone compared to a young adult of the same gender
What are the T scores for the following?:
Normal:
Osteopenia:
Osteoporosis
Normal: >-1
Osteopenia: -1 to -2.5
Osteoporosis: -2.5 or less
What’s the z score for osteoporosis?
Amount of bone compared to same age and gender
How is the dx of osteoporosis made?
- One or more fragility fractures
2. T score of -2.5 or less on DEXA
When should you treat osteoporosis pharmacologically?
T score -2.5 to -1.0 at high risk for a fracture
At what age should DEXA be performed?
65+, or less if have an increased risk
What class of drugs are alendronate, risendronate, etc?
Bisphosphonates
Normally, low Ca stimulates production of PTH, causing the following effects in:
- renal excretion of Ca
- renal production of vit D
- gut absorption of Ca
- Decreased renal excretion of Ca
- Increased production of Vit D by kidney
- Increased gut absorption of Ca
What’s the main cause of primary hyperparathyroidism?
Adenoma
Do more females or males get hyperparathyroidism?
Females
About 98% of Ca is in the ________?
Bones
What conditions can cause secondary hyperparathyroidism?
Chronic renal dz, dialysis, vit D deficiency (can be from Crohn’s or celiac)
What type of diuretics can cause elevated Ca?
Thiazide
Describe the chain of thyroid hormone production?
Hypothalamus: TRH released
Anterior pituitary: TSH released
-stimulates production of thyroid hormones
-Thyroid gland: mono and di to tetra-iodotyrosine to tri-iodotyrosine
Where are T1 and T2 converted to T4?
Outside thyroid
Where is T4 converted to T3?
Outside thyroid
What do T3 and T4 (thyroxine) do?
Perform thyroid bodily functions and suppress TRH and TSH
Is T3 or T4 more active?
T3
In circulation, is T3 or T4 more prevalent?
T4
What could the following all cause:? Low albumin PTH resistance Low vit D Dietary Ca deficiency Low Mg Elev phosphorus Pancreatitis Renal failure
Low Ca
T/F: the thyroid is the only place in the body that uses iodine?
T
What’s a struma ovarii?
Teratoma that contains mostly thyroid tissue and will pick up iodine on scans
What does an elev TSH mean?
Hypothyroid
What does an elev T3/T4 mean?
Hyperthyroid
Is Graves hyper or hypothyroid?
Hyper
What’s the treatment of hyperthyroid?
PTU
Can a goiter be euthyroid?
Yes
Which is the most common (>70%) type of thyroid cancer which has low mortality but high recurrence?
Papillary
Which thyroid cancer is approx 15%, usually age 40-60 years old, often has distant mets and does not pick up iodine well on scans?
Follicular
Which thyroid cancer is calcitonin-secreting (C cells; parafollicular), and can be part of MEN syndrome?
Medullary
Which thyroid cancer is rare, seen more in elderly males, mets to the lung quickly, and has a high death rate?
Anaplastic
What are the 2 treatments for thyroid cancer?
- Surgical
2. RAI
If a patient has high TRH, what does the type of hyperthyroidism have to be?
Hypothalamic tumor