Endocrinology Flashcards
3 basic problems with endocrine system?
- excess hormones - widespread effect
- reduced hormones - widespread effect
- physical gland enlargement - mass pressure/effect
pituitary gland produces what hormone that encourages the thyroid to produce T4/T3?
TSH
Thyroxine excess is a disease of the thyroid causing?
hyperthyroidism
thyrotoxicosis
Thyroxine lack is a disease of the thyroid causing?
hypothyroidism
Thyroid mass changes is a disease of the thyroid causing?
Goitre
incidence of hyperthyroidism?
2-3% of women
0.2% men
age common = 20-40 years
most common causes of hyperthyroidism?
autoimmune e.g graves disease = most common
goitre or toxic adenoma
pituitary driven
symptoms of hyperthyroidism?
sweating, heat intolerance
irrtable, poor sleep, anxiety, palpitations
excess appetite, weight loss, diorrhea
breathlessness
signs of hyperthyroidism?
warm moist skin tachycardia - irregular heart rate increased blood pressure, heart failure fine tremor goitre
what is graves disease?
eye disease exopthalmus opthalmaplegia lid lag/retraction loss of visual activity
signs of graves disease?
pretibial myxoedema
diagnose graves disease?
clinical
blood tests - thyroid function - low TSH, high T3/4, autoantibodies
radiology sometimes
management of graves disease?
anti thyroid drugs - carbimazole, propylthiouracid
beta blockers - control symptoms while other tx
surgery - control disease first, poss eye surgery
radioactive iodine - caution if youner/pregnant/breastfeeding
incidence of hypothyroidism?
2% women
0.2% men
mean age of diagnosis = 60 yrs
causes of hypothyroidism?
autoimmune most common = destructive
iatrogenic - surgery, radioiodine
iodine deficiency - rare - iodised salt/fish, poor mountainous areas
rarely pituitary disease
symptoms of hypothyroidism?
cold intolerance weight gain constipation hoarse voice puffed face/extremities mental slowness/poor memory hair loss
signs of hypothyroidism?
slow pulse large tongue deep voice thin/dry hair loss of eyebrows goitre coarsening of features acute - rare - coma - hypothermia
diagnosis of hypothyroidism?
clinical
blood tests - thyroid function tests - high TSH, low T4/T3
auto antibodies
radiology
management of hypothyroidism?
replacement
thyroxine
levothyroxine
what is goitre?
thyroid masses