Endocrine Flashcards
(95 cards)
What is the most common cause of thyrotoxicosis?
Graves’ disease is the most common cause of thyrotoxicosis. Only 30% of patients with Graves’ disease have eye disease
What % of patients with Graves’ disease have eye disease
Only 30% of patients with Graves’ disease have eye disease
@Hypo: hormonal response = ??
@Hypo: hormonal response = 1. decreased insulin secretion 2. INCreased glucagon secretion 3. GH and cortisol are also released but later.
@Addison’s = cortisol low - - > ??
Hence the what test?
@Addison’s = cortisol low - - > hypoglycaemia. Hence the insulin tolerance test i.e. Give insulin - - > induce hypoglycaemia - - > inadequate rise in serum cortisol #adrenalinsufficiency
Incretins eg GLP1 = stimulate ??
Incretins eg GLP1 = stimulate a decrease in blood glucose, esp after eating.
Pioglitazone works how? Side effects?
PPAR-gamma AGonists = reduce peripheral insulin resistance = BFFFL - bladder ca, fatness, fluid retention, fractures, LFTs deranged
PID: Ix and tx?
PID: hcg, high vag swab - > metro + (ofloxacin/IM ceft+doxy)
What is dynamic pit function test?
“dynamic pituitary function test = give pt:
Dopamine blocker = metoclop - > Prolactin measured #hyperprolactin
LHRH - > FSH/LH recorded at reg intervals
Insulin - > BM, cortisol + GH
TRH - > TSH”
which tabs = reduce LTx absorption? How many hrs apart?
Fe/CaCO3 tabs = reduce LTx absorption - - > give 4 hrs apart!!
short fourth and fifth metacarpals, short stature
cognitive impairment, obesity
Pathphys? Types?
PseudohypoPT “G-prot mutation - > target cell insensitivity to PTH - > (high PTH -> low Ca + high PO4)
T1 = cell receptor fucked &
T2 = cell receptor fine.”
RAI - > ??
RAI - > ppt thyroid eye disease & need LTx
lack of smell (anosmia) + delayed puberty”
Pathphys??
“XrKallmann’s = GnRH neurons fail to migrate to the hypothalamus - >
hypoGnRH hypogonadism - >
lack of smell (anosmia) + delayed puberty”
pretibial myxoedema is associated with ??
pretibial myxoedema is associated with thyrotoxicosis Graves only!!
Hypothyroid skin sx?
Hypothyroid: OedemaNP, Lat eyebrow loss, Xanthomata and other standard stuff
Hyperthyroid: skin sx?
Hyperthyroid: pretib myxoed, acropachy, sweating, thinning hair
“Amiodarone high iodine content - - > ?effect
Pathphys? How manage?
“Amiodarone high iodine content of - - > Wolff-Chaikoff effect= high iodide - > autoreg phenomenon where thyroxine-prod stopped = hypothyroid - >
cont amiodarone + start LTx”
Amiodarone Ind Thyrotoxicosis Type 1 - > pathphys? sx? tx?
Amiodarone Ind Thyrotoxicosis Type 1 - > XS thyroid hormone #goitre - > Carbimazole/KPerchlorate
Amiodarone Ind Thyrotoxicosis Type 2 - > pathphys? sx? tx?
Amiodarone Ind Thyrotoxicosis Type 2 - > thyroid destroy - > csteds
Acromegaly tx?
“Trans-sphenoidal surg/ext irrad @oldies
Octreotide=somatostatin stops GH release #adj to surg / bromocript-dop ag used too
Pegvisomant-GH receptor blocker-> dec IGF”
“Acromegaly 1st line Ix:
??
“Acromegaly 1st line Ix:
Serum IGF-1 w/ serial GH measurements –>
if IGF1 high - - >
OGTT to confirm i.e. norm/high GH - - > MRI”
Patients with acromegaly have an increased incidence of ??bowel issue
Patients with acromegaly have an increased incidence of colorectal polyps and carcinoma
The Incretin effect:
?? mediated by?
In T2DM, this is less or more so? Side effects? how to stop GLP1 its breakdown?
“The Incretin effect:
oral glucose load - - > greater insulin release
IV glucose load - - > less insulin release #incretineffect=mediated by GLP-1.
In T2DM, this is less, so give pts more GLP1 #N&V+pancreatitis or stop its breakdown (DPP4igliptins!!)”
DI: cranial: causes?
DI: cranial: Craniopharyngioma, heamachromatosis, histiocytosis X, Head injury, idiopathic, pit surg, DIDMOAD
Nephrohenic di causes?
Nephrohenic: demeclocycline, lithium, high Ca low K, ADH receptor dx/aquaporin