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Pathology > Path Lab Midterm > Flashcards

Path Lab Midterm Flashcards

1
Q

What species is the most common to get squamous cell carcinoma and where?

A

HORSE - penis/eyelid
dog/cat - skin
cow - eye/vulva

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2
Q

What is the round hyaline red stained structure in a squamous cell carcinoma?

A

keratin pearl

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3
Q

What is not a tumor that is seen on bovine eyes?

A

dermoid (adnexa present) - hyperplasia

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4
Q

What nailbed tumor is benign?

A

subungual keratoacnthoma - no breach of basal lamina

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5
Q

What 2 nail bed tumors are malignant?

A

subungual squamous cell carcinoma

subungual malignant melanoma

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6
Q

What species do not get papillomas?

A

cats

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7
Q

What species do fibropapillomas develop and where?

A

bovine penis and vagina (in young animals)

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8
Q

What are the 2 forms of papillomas in dogs?

A

oral papillomas

cutaneous papillomas

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9
Q

Where do papillomas occur on the horse?

A

nose and lips in young horses, regress quickly

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10
Q

Which species do not get fibromas?

A

dogs

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11
Q

What species get fibrosarcomas most commonly?

A

cats - virus, inflammation, vaccine

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12
Q

What causes fibrosarcomas in dogs?

A

spiro cerca lupi

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13
Q

What tissue is affected by rhabdomyomas?

A

striated muscle

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14
Q

What species get lipomas?

A

dog, cat, horse

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15
Q

Where do lipomas arise in horse? How can it be dangerous?

A

mesentary - death by strangulation

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16
Q

What is the origin of histiocytomas?

A

cutaneous macrophage (langerhan cells)

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17
Q

What does a histocytoma become in a dog?

A

button tumor - benign but grows fast

18
Q

What are the important characteristics of TVT (transmissable venereal tumor)?

A
  1. high incidence in temperate areas
  2. grows as graft
  3. locally invasive
19
Q

What species gets melanoma/melanocytomas?

A

DOG - benign on skin, malignant on mucousa
gray horse - perianal/perineal
mini pigs

20
Q

What species most commonly get mast cell tumors and where?

A

dog - skin, always eosinophils

cat - SPLEEN

21
Q

What are the 3 forms of mast cell tumors in cats?

A

cutaneous - histiocytic, mast cell form
visceral - spleen, ulcers (can be in GI)
GI - no ulcers

22
Q

What stain is used for poorly granulated mast cells in tumors?

A

toluidin blue

23
Q

What is the most common neoplasia in animals?

A

lymphosarcoma

24
Q

What 5 forms of lymphosarcoma do dogs get and what do they cause?

A

Multicentric form and mediastinal form - both cause hypercalcemia
Alimentary
cutaneous
extranodal

25
Q

How much of hemopoietic tumors do lymphosarcomas cause in cats?

A

90%

26
Q

What are lymphosarcomas caused by in cats?

A

FeLV

27
Q

What form of lymphosarcomas do cats not get?

A

cutaneous

28
Q

What are the 3 forms of sporadic lymphosarcomas in cattle?

A

calf, thymic, skin

29
Q

What is the adult form of lymphosarcoma in cattle?

A

enzootic leukosis - BLV

30
Q

What are the 3 forms of plasma cell tumors?

A

cutaneous plasmacytoma - old dogs, benign
extramedullary plasmacytoma - old dogs, rectal mucosa
multiple myeloma - rare, involvement of BM, hypercalcemia

31
Q

What species get hamangiosarcomas and where?

A

dog - common, spleen

cat - liver

32
Q

What are the clinical signs of hemangiosarcoma

A

50% die from sudden rupture
in heart - RA
thrombocytopenia = DIC in dog

33
Q

What glands are involved most commonly for mammary gland tumors in cats?

A

2 anterior ones

34
Q

What is a clinical sign of adenocarcinoma?

A

hypercalcemia (PTH like substance)

35
Q

What describes a “peri anal” gland tumor?

A

dogs - hepatoid looking

36
Q

What are seminomas associated with?

A

dog - cryptorchidism

37
Q

Which species get leydig cell tumors? What do they look like?

A

old dog - rosettes around vessels

38
Q

What species gets sertoli cell tumors and what do they cause?

A

dogs - feminization

39
Q

What are ovarian tumors made of and what do they cause?

A

granuloma cell tumor

cow/horse - nymphomania, masculinization

40
Q

Which species get uterus adenomas?

A

rabbit, cow

Pathology (13 decks)

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