Endocrine Flashcards
Orphan annie, psammoma bodies
Papillary
Most common thyroid malignancy
Papillary
Ground glass, pale nuclei w/ inclusions and central grooving
Papillary
Ret gene
Papillary & Medullary
Amyloid stroma
Medullary
HypoCa, RET gene
Medullary
Calcitonin, C-cells
Medullary
Invasion of tumor capsule & blood vessels
Follicular carcinoma - adenoma does not invade capsule
Dense fibrous capsule
Follicular adenoma
RAS gene
Follicular
Hematogenous spread, no needle bx thyroid Ca type?
Follicular
NON-tender thyroiditis, very low RAIU
Subacute LYMPHOCYTIC
Tender thyroid, very low RAIU
Subacute/De Quervains Granulomatous
Firm thyroid
Riedel’s fibrosing
Chvostek & Trousseau sign
HypOCa d/t PT resection/hypothyroidism, CKD –> dec 1,25OH
Diffuse inc RAIU uptake –> most likely to develop hypOthyroidism
Grave’s (vs. subacute or exogenous=dec/low, tumor = patchy)
Scalloping of colloid
Grave’s - Ab to TSH-Receptor
SE of RAI tx for Graves’ (#1 choice)
Worse proptosis (10%) (pre-tx w/ steroids), perm hypOthyroidism (80%)
Use of anti-thyroid drugs for Grave’s
PTU in preg, PTU –> vaculitis, Both PTU & MMI –> agranulocytosis
Risks/SE of thyroid surgery
Laryngeal nerve damage, hypoCa
Low TSH, Inc T4, hot RAIU uptake
Functioning nodule –> I2 ablation or ?lobectomy
Low TSH, inc T4, cold RAIU next step?
U/S FNA –> usually tx w/ RAI?
Unsure US FNA, non-functioning RAIU scan
Cancer –> surgery
Low TSH, high T4,3, low RAIU, next step?
Measure Ig - low = exogenous, high = thyroiditis, extraglandular production
Chronic inflammation of germinal centers w/ Hurthule cells
Hashimoto’s (microsomal abs)
Lymphocytic infiltration of thyroid
Hashimoto’s (microsomal abs)
Hurthle cells
Hasimoto’s & Follicular thyroid CA
Anti-TPO Abs –> transient hyperthyroidism
Hashimoto’s
Hx of Hashimoto’s –> enlarging thyroid = ?
Marginal B-cell lymphoma/thyroid lymphoma —> core needle bx
Hypothyroidism, donut sign on CT, voice change, pseudocyst on US
Thyroid lymphoma
Pancreas (insulin or gastrinoma), Parathyroid, Pituitary
MEN I - Ca stones
Medullary, Parathyroid, Pheo
MEN IIA –> metanephrine measure + PCR DNA testing
Medullary, Marfan or mucosal/intestinal neuromas, Pheo
MEN IIB
Ret gene
MEN IIA/B
Thyroid nodule 1st step
PE + TSH +US
Thyroid nodule w/o hypoechoic, calcification or vascularity next step
High TSH = FNA ; Low TSH –> RAIU
Inc T4, Normal/High TSH, hyperthyroidism
Pituitary adenoma –> TSH
Very low TSH, tachy, weight loss - control Sx?
Propanolol for hyperthyroidism –> iodine tx/dx of Grave’s
Pregnancy THs
Inc total, bound T4,3, TBG, Dec TSH, Same free
Untx hyperthyroidism –> ?
Osteoporosis
Myalgias, proximal weakness, slow reflexes
Hypothyroidism - TSH, free T4 –> EMG –> Bx
Growth /yr, goiter, myxedema, amenorrhea, umbilical hernia, hypothermia
Hypothyroidism
Poor feeding, lethargy, constipation, large ant. Fontanelle, protruding tongue
Hypothyroidism
Apathy, weakness, hypotonia, large tongue, slow movements, constipation
Hypothyroidism
Low T3,4 Low TSH, hypothyroidism
Secondary (pituitary) or tertiary hypothyroidism
Inc T3,4 Normal TSH, hypothyroidism
Resistance to thyroid hormones
1 cause of congenital hypothyroidism
Thyroid dysgenesis (90%)
Sensorineural hearing loss, hypothyroidism
Penred syndrome
Other cause of congenital hypothyroidism
PTU in pregnancy, Maternal auto-immune
Tachy, warm, vitiligo, alopecia, can’t concentrate, gyecomastia in boys
Hyperthyroidism
1 congenital hypothyroidism in US
Thyroid dysgenesis; Iodine deficiency worldwide
Reduce decline in GFR/macroproteinuria in DM
Tight BP control - ACE
DKA acute tx
Normal saline + regular insulin –> D5 +K when BG 200-250
DM BP goal
<130/80
DM goals
A1c <7, LDL 70-100, low carbs, low sat fat,
Gestational DM screening
50g 1hr GCT @24-28wks
GCT >130 next step
100g 3hrs GCT >95, 180, 155, 140 = abnormal
Dx criteria for DM
Random >200, fasting >126, A1c >6.5
DM maintenance tests
Lipids, Cr, Microalbumin, eye exam, foot exam, EKG, TSH in type 1