Endocrine Flashcards
Process of T3/4 production
Hypothalamus makes TRH
Pituitary makes TSH
Thyroid makes T3/4
Difference between Grave’s and De Quervain’s
Graves is painless goitre, de Quervains is painful goitre
treatment graves
Propanolol and carbimazole
Treatment hashimoto
Levothyroxine
Treatment de Quervains
NSAIDs
Treatment iodine deficiency
Iodine replacement
Diabetes 2 treatment pathway
lifestyle changes
metformin
Gliclazide when no concern about weight, sitagliptin when there is
Cushings cause
high cortisol - steroids or pituitary tumour
Cushing’s symptoms
Moon face, buffalo hump, high BP, striae, loss of strength
Addison’s cause
Low cortisol and low aldosterone
destructions of adreansl
Bloods for Addisons
Low Na+, low glucose, high K+
Sx Addisons
Lethargy, hyperpigmentation, vitiligo, hyponatraemia and hyperkalaemia
Signs fibroidd
menorrhagia and dysmenorrhea
Suprapubic mass
Pelvic pressure and discomfort
Diagnosing fibroids
Transvaginal US
management fibroids
<3cm mirena coil + NSAID + tranexamic acid
>3cm surgery
Endometriosis sx
Abdominal pain, chocolate cysts on USS
Diagnosing endometriosis
Laparoscopy
Sx ectopic pregnancy
Shoulder tip pain, unilateral pelvic pain, chandelier’s sign
treatment ectopic pregnancy
methotrexate or surgery
Stress incontinence
Leaking of urine due to increases abdominal pressure
Urge incontinence
Involuntary loss of urine associated with urgency
Tx stress incontinence
Pelvic floor exercise, duloxetine
Tx urge incontinence
Bladder train and anticholinergic
Missing 1 COCP
Take missing pill, no extra protection needed
Missing >1 COCP
Take most recent missed pill ASAP
Abstain from sex until 7 days taking pill
Missing POP
Take pill ASAP, continue with next pill and extra contraception for 48 hours
When can you start COCP after pregnancy?
6 weeks
When can you start POP after pregnancy?
Anytime
bacterial vaginosis sx
Fishy smelling, watery discharge
pH >4.5
Tx bacterial vaginosis
Metronidazole 400mg
Candidiasis sx
pH <4.5
Cottage cheese discharge
candidiasis treatment
clotrimaxole
Chlamydia sx
Dysuria, abnormal bleeding
tx chlamydia
doxycycline 100mg
Gonorrhoea sx
dysuria, abnormal discharge - odourless but yellow/green
Abnormal bleeding
tx gonorrhoea
Ceftriaxone
PID sx
dysuria, abnormal discharge, cervical tenderness
Tx PID
doxycycline + ceftriaxone
Ovarian torsion sx
Worst pain
Palpable pelvic mass
Tenderness
Whirlpool sign on USS
Sheehan’s syndrome
Complication following PPH
PPH = low blood volume = low BP = low perfusion of pituitary = AVN
Sx Sheehan’s syndrome
lack of milk production + amenorrhea
Most common type of ovarian cancer
serous
Sx Grave’s disease
Weight loss
Heat intolerance
Anxiety and tremor
Smooth, painless goitre
Exophthalmos
ABs in Grave’s
Anti-TSH
Tx Hashimoto
Levothyroxine
What is De Quervain’s syndrome?
Viral infection causes painful goitre
Function of adrenal medulla
Chromaffin cells to make catecholamines - adrenaline etc
Treatment pathway for t2 diabetes
first line: metformin
second line: metformin + gliclazide
third line: metformin + 2x gliptins/sulfonylureas/pioglitazone/gliflozins
Treatment pathway for t2 diabetes
first line: metformin
second line: metformin + gliclazide
third line: metformin + 2x gliptins/sulfonylureas/pioglitazone/gliflozins
treatment for t1 diabetes
Insulin
S/e insulin
Hypoglycaemia and weight gain
MOA metformin
Decreases hepatic gluconeogenesis
MOA sulfonylureas
Stimulate B cells to make insulin
S/e sulfonylureas
Weight gain and hyponatraemia
E.g. sulfonylureas
Gliclazide
MOA thiazolidinediones
Activate PPAR = adipogenesis and fatty acid uptake
S/e thiazolidinediones
Weight gain and fluid retention
MOA DPP-4 inhibitors
Increases incretin levels = inhibited glucagon
MOA SGLT-2 inhibitors
Inhibits glucose reabsorption in kidney
Management Graves’s disease
Carbimazole
Treatment for Hashimoto’s
Levothyroxine
Sx primary hyperparathyroidism
Goitre, exophthalmos
Tx primary hyperparathyroidism
Parathyroidectomy
Sx secondary and tertiary hyperparathyroidism
Fractures, salt and pepper skull
Sx primary hypoparathyroidism
Chvostek and Trousseau sign
Investigations primary hypoparathyroidism
low PTH and calcium, high phosphate
How to treat hypoparathyroidism
Calcium and vit D
Sx acromegaly
Large hands and feet
Frontla bossing
ED
Galactorrhoea
Management of acromegaly
Transsphenoidal surgery and ocreotide
What is SIADH?
Too much ADH made - more water reabsorbed
Sx SIADH
Headache, myalgia, N+V, coma
Tx SIADH
Treat underlying condition
ADH antagonist
What are the three parts of the fallopian tube?
Isthmus (closest to uterus), ampulla, infundibulum
Where does fertilisation most commonly occur:
Ampulla (middle third of Fallopian tube)
What is secondary amenorrhoea?
Periods have started but stop for 6+ months - due to stress etc
What is primary amenorrhoea?
Periods haven’t started but breast development etc has - by age 15
Absent vas deferens cause
Cystic fibrosus
Sheehan syndrome
severe blood loss or extremely low blood pressure during or after childbirth. Lack of blood flow to the pituitary gland, can cause damage to the gland and lead the pituitary dysfunction
receptor on theca cell
LH
Receptor on granulose cell
FSH
Ulipristal acetate
EllaOne - used as emergency contraception
Take within 120 hours
Selective progesterone receptor modulator - inhibits ovulation
How long before POP is effective?
48h
What are the two hormones involved in milk and their functions?
Oxytocin = milk ejection
Prolactin = milk production
The testicular artery is a branch of the …
Abdominal aorta
Treatment for hypermeesis gravidarum
Antihistamines (cyclising or promethazine)
Ondansetron and metoclopramide are second line
Most common cause of PID
Chlamydia
Most common cause od neonatal sepsis
GBS
most common type of ovarian cancer
Serous carcinoma
Risk factors for ovarian cancer
BRCA1/2 mutation
Early menarche, late menopause, nulliparity (all increase ovulations)
Sx ovarian cancer
Abdo distension/bloating
Abdo/pelvic pain
Urinary urgency
Early satiety
Diarrhoea
Diagnosing ovarian cancer
CA125 screen and US if raised
Into which layer of the uterus does an embryo implant?
Submucosal
Major arterial supply to breast
Internal mammary
How to treat hypertension in pregnancy
Aspirin 75mg from 12 weeks pregnant
Describe the process of fertilisation
Sperm penetrates corona radiata
Sperm head binds to zone pellucid
This triggers acrosome reaction - hydrolytic enzymes digest zone pellucid and create pathway to ovum
Sperm enter ovum
Sperm and ovum fuse
Sperm releases calcium ions to prevent polyspermy
Where is onuf’s nucleus found
Anterior horn of s2 nerve roots
Which hormone reduced BP in pregnancy?
Progesterone
Advantages of breast feeding
Involution of uterus, protecting against breast and ovarian cancer
IgA and lactoferrin (ensures iron absorption) to baby, reduced incidence of ear infections and eczema, reduced T1DM
Disadvantages of breast feeding
Jaundice
Vit d/k deficiency
Transmission of disease
How do you differentiate between primary and primordial follicles?
Primordial contain oocyte and granulose cells
Primary marked by development of zone pellucida
Up to what stage of oogenesis do cells develop in utero
Prophase I
U; until what stage are oocytes held before fertilisation
Metaphase ii
Skin layers of scrotum
skin
dartos muscle
external spermatic fascia
cremasteruc muscle
internal spermatic fascia
parietal layer of tunica vaginalis
How do you extract fluid from pouch of Douglas?
Needle through posterior vaginal fornix
What causes asymmetrical intrauterine growth reduction
Placental insufficiency
Hormonal changes menopause
Cessation of estradiol and progesterone production
What is an amniotic fluid embolism
Foetal cells enter mother’s bloodstream
Sx amniotic fluid embolism
Chills, shivering, sweating, coughing, cyanosis, hypotension, tachycardia, MI
What is acromegaly ?
Excess growth hormone due to pituitary adenoma
Sx acromegaly
- Spade-like hands
- Coarse facial appeartance
- Large tongue
- Excessive sweating
- Pituitary tumour sx - headaches, hypopituitarism, bi-temporal hemianopia
ED
galactorrhea
Tx acromegaly
trans-sphenoidal surgery and somatostatin analogue - ocreotide
Diagnosing acromegaly
OGTT
Glucose normally suppresses growth hormone. In normal OGTT, GH levels will be undetectable but in acromegaly they remain elevated
Treatment for acute and chronic Addison’s
acute = hydrocortisone
Chronic = glucocorticoids and mineralocorticoid
What is Bartter’s syndrome
Autosomal recessive cause of hypokalaemia following defective NaKCC transporters in aLOH
Like taking lots of furosemide
Sx Bartter’s
Weakness
Polyuria/polydipsia
Hypokalaemia
Normotension
most common cause of congenital adrenal hyperplasia
21-hydroxylase
What is DKA
Complication of T1DM, uncontrolled lipolysis makes FFA that are converted to ketones
Caused by infection, missed insulin dose and MI
Sx DKA
Abdo pain
Polyuria, polydipsia and dehydration
Kussmaul breathing
Acetone smelling breath
Tx DKA
fluid bolus and insulin infusion
Blood results for DKA
Glucose >11 or known diabetes
PH<7.3
bicarb <15
Ketones >3
What is Klinefelter’s
An example of primary hypogonadism with high LH and low testosterone
Karyotype 47 XXY
Sx Klinefelter’s
- Very tall
- Lack of secondary sexual characteristics
- Small, firm testes
- Infertility
- Gynaecomastia
What is Kallman’s syndrome
Delayed puberty due to hypogonadotrophic hypogonadism - failure of GnRH neurons in hypothalamus
A type of secondary hypogonadism
X-linked recessive
Sx Kallman’s syndrome
- Delayed puberty
- Anosmia
- LH and FSH levels are low
- Cleft lip/palate
- Normal/above average height
drug causes of gynaecomastia
SPIRONOLACTONE, digoxin
most common type of thyroid cancer
papillary
treatment thyroid cancer
thyroidectomy and iodine
which compound indicates thyroid cancer recurrence
thyroglobulin
causes of primary hyperaldosteronism
unilateral can be by adrenal adenoma - Conn’s syndrome
Sx primary hyperaldosteronism
hypertension and hypokalaemia
Ix hyperaldosteronism
aldosterone:renin
CT
AVS
Mx hyperaldosteronism
unilateral: surgeru
bilateral: aldosterone antagonist - spironolactone
Water deprivation results for cranial DI
Low after deprivation, high after ADH
Water deprivation tests for nephrogenic DI
Low after deprivation, high after ADH
Which drug causes both hypo and hyper thyroidism
Amiodarone