Thyroid

Question 1

thyroid follicular cells regulate what? they produce what yalllll???

Answer 1

rate of metabolism and growth, they make T3 and T4, YA NEED IODINE OMG

Question 2

what do thyroid c cells make

Answer 2

calcitonin (ooposite actions of PTH)

Question 3

hypothyroidism is common in _____, and what are the two possible causes?

Answer 3

dogs
- idiopathic follicular collapse
- lymphoctic thyroiditis

Question 4

C/S of hypothyroidism?

Answer 4

reduced metabolic rate, weight gain, alopecia, hyperkeratosis, hyperpigmentation, myxedema (mucin and water in the dermis, thiccccc skin ew), hypercholesterolemia, low sperm/fertility

Question 5

what is goiter? causes?

Answer 5

clinical term used to describe a NONNEOPLASTIC and NON INFLAMMATORY enlargement of the thyroid glands

causes:
iodine deficiency, goitrogenic compounds, excess idodine, genetic enzyme defects

Question 6

pathogenesis of goiter?

Answer 6

not enough thyroid hormone synthesis, decreased blood T3 and T4, increased TRH, increased TSH, hypertrophy/hyperplasia of follicular cells

Question 7

what is CHDS in foals?

Answer 7

congenital hypothyroidism-Dysmaturity Syndrome: foals die quickly after being born, common in western canada, prolonged gestation, appear dysmature, MSK abnormalities, mandibular prognathia, don’t know what causes it!

Question 8

hyperthyroidism is common in _____. what is the cause usually?

Answer 8

cats
multifocal nodular hyperplasia and thyroid follicular adenoma»»>thyroid follicular carcinoma

Question 9

if a dog gets hyperthyriodism, what’s the prognosis?

Answer 9

BAD it’s usually malignant

Question 10

what is one reason why hyperthyroidism is less common in dogs

Answer 10

they have more efficinecy enterohepatic excretion of thyroid hormones

Question 11

C/S hyperthyroidism?

Answer 11

weight loss with increased appetite
PUPD
can look like HCM–>tachycardia
abscence of normal fat in places like mesentery and perirenal

Question 12

multifocal nodular hyerplasia of the thyroid gland is common in ____ and is inactive, except in ____. these will look

Answer 12

old horses and cats
cats
like multiple, tan to brown nonencapsulated nodules

Question 13

thyroid follocicular cell adenoma is common in ____. what they lookin like doe???

Answer 13

cats
single, white to tan, well defined and encapslated mass

Question 14

thyroid follicular carcinomas are common in _____, how do they look???

Answer 14

dogs, they are invasive and will not respect tissue borders