Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

VET 410: Endocrinology > Thyroid Gland Pathology > Flashcards

Thyroid Gland Pathology Flashcards

1
Q

which thyroid gland is more rostral/cranial

A

right thyroid

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

what color is colloid on histology

A

pink - colloid is proteinaceous due to thyroglobulin

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

relative thyroid hormone form abundance

A

protein bound T4 > protein bound T3 > free T4 > free T3

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

thyroid follicular cysts

A

multifocal cysts that cause bilateral thyroid enlargement

species: goats

NOT associated with endocrinopathy

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

what species is thyroid hypofunction most commonly seen in

A

dogs and horses

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

causes of hypothyroidism

A
  1. lymphocytic thyroiditis
  2. idiopathic follicular atrophy
  3. goiter
  4. congenital thyroid gland hypofunction
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

lymphocytic thyroiditis

A

immune mediated atrophy of the thyroid gland

bilateral thyroid atrophy with lymphocytic infiltrate

possibly predisposes to idiopathic follicular atrophy

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

idiopathic follicular atrophy

A

loss of thyroid glandular tissue - replaced by connective tissue

possible sequelae to lymphocytic thyroiditis

bilateral thyroid atrophy

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

goiter

A

congenital thyroid gland hyperplasia

something interferes with T3/4 synthesis in utero leading to overstimulation of TRH and TSH –> follicular hypertrophy without increasing T3/4 production –> hypothyroid with enlarged thyroid glands

bilateral thyroid enlargement

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

what are possible causes of goiter

A
  1. iodine deficiency of the dam
  2. genetic defects (lack of TP enzyme)
  3. dam consumption of goitrogenic substances
  4. high iodine ingestion (unknown mechanism)
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

congenital thyroid gland hypofunction

A

similar to goiter but does NOT cause the same lesion
- hypothyroidism without thyroid gland enlargement
- stunted growth, delayed tooth eruption, delayed secondary ossification

seen in carnivores and horses

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

thyroid hyperfunction

A

disorders of growth of the thyroid

hyperplasia –> adenoma –> carcinoma

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

what species is hyperthyroidism common in

A

cats: functional hyperplasia
horses: adenomas (nonfunctional)
dogs: carcinomas (nonfunctional)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

thyroid adenoma/nodular hyperplasia

A

multiple nodules on the thyroid glands that secrete excess T3/4

seen in cats most commonly

difficult to differentiate between nodular hyperplasia and adenomas (unilateral more likely adenoma)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

secondary lesions associated with hyperthyroidism in cats

A
  • left ventricular concentric hypertrophy
  • hyperactivity
  • azotemia
  • weight loss + polyphagia
  • vomiting
  • hyperparathyroidism
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

thyroid carcinoma

A

large, locally invasive masses that do NOT secrete excess T3/4 (non functional)

more common in dogs

can invade internal carotid and vagosympathetic trunk

VET 410: Endocrinology (14 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions