Cardiovascular tumours

Question 1

Hermangiosarcoma

Answer 1

-dogs, typically spleen and heart (right atrium)
-can cause cardiomegaly, hemopericardium, cardiac tamponade
-dark red colour
-metastasizes to lungs, brain, kidneys, liver

Question 2

Answer 2

Hermangiosarcoma

Question 3

Hermangioma

Answer 3

-benign tumour of endothelial cells
-dogs, cats, horses, sheep, pigs
-most commonly in skin
-blood filled masses

Question 4

Rhabdomyoma and Rhabdomyosarcoma

Answer 4

-rare neoplasia of domestic animals
-sometimes congenital
-white mass in heart muscle

Question 5

Chemodectomas

Answer 5

Tumours of extra cardiac tissues arising from chemoreceptors (aortic and carotid bodies)
-rare, often benign
-Aortic body: firm white masses near base of heart
-Carotid body: firm white masses near bifurcation

Can cause heart failure due to compression of right atrium, vena cava, and great arteries

Question 6

Myxoma and myxosarcoma

Answer 6

-rare in domestic animals, most common in dogs
-most common in humans
-tumours of endocardium of chambers or valves; forming from undifferentiated vasoformative cells

**impairs blood flow in chambers=heart failure
**can fragment=forming emboli that heads to lungs

Question 7

Answer 7

Myxosarcoma/myxoma
-soft, gelatinous, pedunculated, multilobular neoplasm of heart chambers/valves

Question 8

Lymphoma

Answer 8

-most common secondary tumour of heart
-multifocal disseminated white nodules
-malignant cells infiltrated myocardium in histo!

Question 9

Answer 9

Lymphoma