05 - thyroid gland dysfunction

Question 1

1. uncommon; poorly understood in horses
2. primary hypothryoid problems haven’t been documented in adult horses

Question 2

(neonatal hypothyroidism)

(etiology)

1. hyperplastic thyroid = goiter
2. caused by what?
3. breed or sex predilection?

Answer 2

2. ingestion of excess iodine during pregnancy
3. no

Question 3

(neonatal hypothyroidism)

1. Cx?

Answer 3

1. goiter (not always present)

(incoordination, poor suckle response, hypothermia, tendon contracture, incomplete ossification of carpal/tarsal bones, poor righting reflexes)

Question 4

(neonatal hypothryoidism)

1. only effective when?

Answer 4

1. during critical period of development

Question 5

(adult hypothyroidism)

1. cause?
2. Cx = lethargy, poor ex tolerance, musc problems, ^ sens to cold temps, delayed shedding of hair, coarse/thickened face

Answer 5

1. surgical thyroidectomy

Question 6

(adult hypothyroidism)

(diagnosis)

1. difficult and expensive, hard to find TRH or TSH, and results are difficult to interpret
2. T4 levels should be low and TSH should be high

Question 7

(adult hypothyroidism)