Endocrinology Flashcards
(46 cards)
Who and when to screen for T2DM
Prepubertal children with 3+ risk factors starting at age 8
Pubertal children with 2+ risk factors
Screen every two years with A1C and fasting glucose
Risk factors: Family hx, high risk ethnic group, obesity, signs of insulin resistance, PCOS, IDM, atypical antipsychotic use
Lab values to diagnose diabetes
Fasting glucose > 7
Random glucose 11.1+
OGTT 11.1+
A1C > 6
Target A1C for
1. T1DM
2. T2DM
- ≤ 7.5
- ≤ 7
When to screen for complications of T2DM
Yearly for everything except HTN, which is twice a year
Kallmann syndrome
Issue with migration of olfactory and GnRH expressing neurons
Hypogonadotropic hypogonadism (lack of puberty)
Anosmia
Can also get renal agenesis, abnormal hand movements, cleft lip/palate
How many cms per year should a child grow at ages
1. 0-12 mo
2. 12-24 mo
3. 24-36 mo
4. Childhood
5. Female puberty
6. Male puberty
- 24
- 10
- 8
- 6
- 8
- 10
How does puberty start in girls vs boys
Girls = thelarche
Boys = testicular enlargement
Delayed puberty ages in girls vs boys
Girls = no breast development by 13, no menarche by 16
Boys = no testicular enlargement by 14
Precocious puberty ages in girls vs boys
Girls < 8
Boys < 9
Zones of the adrenal gland
GFR, salt sugar sex
Zona glomerulosa (aldosterone)
Zona fasciculata (cortisol)
Zona reticularis (androgens)
Medulla (norepinephrine)
Diagnosis of adrenal insufficiency
Low AM cortisol
ACTH stim test
Addison disease
Primary adrenal insufficiency
Antibodies destroy the cortex
Results in low cortisol and aldosterone
Hyperpigmentation seen because of high ACTH
Hypovolemia, hyponatremia, hyperkalemia, salt craving
Waterhouse-Friedrichsen syndrome
Bilateral adrenal hemorrhage from meningococcemia
Leads to adrenal insufficiency
Premature adrenarche/pubarche
Benign condition caused by early production of adrenal androgens
Pubic or axillary hair, body odor, acne
NO gonadal involvement (breast, testicular enlargement)
Must rule out other causes, precocious puberty (testosterone, DHEAS, androstenedione, 17-OHP, bone age)
Familial short stature
Parallel to standard curves
Bone age = chronologic age
Family members are short too
Constitutional growth delay
Decreased weight and height in infancy, then follows curve in middle childhood
Accelerated growth in late adolescence and achieved expected adult height
Bone age less than chronological age
When and who should be screened for dyslipidemia
Universal fasting or nonfasting HDL-C or LDL-C between 2-10 years
Selective screening for children > 2 with positive family history of premature CVD, medical conditions, and other risk factors (obesity, HTN, smoking)
What to do if lipid screen is abnormal
2 fasting lipid profiles at least 2 weeks apart, but not more than 3 months
Who should get started on a statin
LDL ≥ 4.9
3.4-4.9 if multiple risk factors
Familial combined hyperlipidemia vs familial hypercholesterolemia
Combined = elevated cholesterol and TGs
Hyperchol = just elevated cholesterol (LDL)
When to treat congenital hypothyroidism
If TSH > 40 = treat immediately
If TSH 15-40 = can wait for serum results
Want to start treatment by 2 weeks
Bone age in hypothyroidism
Delayed
Hashimoto
Chronic autoimmune thyroiditis
Positive TSI and TPO antibodies
Leads to hypothyroidism!
Features of hyperinsulinism on labs
Detectable insulin
Suppressed ketones/FFAs
Response to glucagon (>1.7)
Positive C-peptide (endogenous insulin)