histopathology practical 2

Question 1

Where does the canine parvovirus replicate?
- in the middle part of villus
- in the respiratory epithelium
- in the upper part of villus
- in the lieberkühn crypts

Answer 1

• in the lieberkühn crypts

Question 2

What is phlegmon?
- circumscribed fibrinous inflammation
- diffuse purulent inflammation
- diffuse fibrinous inflammation
- circumscribed purulent inflammation

Answer 2

• diffuse purulent inflammation

Question 3

True or false: Mast cell tumors tend to be itchy and exulcerated
- true
- false

Answer 3

• true

Question 4

Which cells take part mostly in the process of the phlegmon?
- eosinophil granulocytes
- neutrophil granulocytes
- adipocytes
- lymphocytes

Answer 4

• neutrophil granulocytes

Question 5

How do we call in another way the fibrinous inflammation in the guts, in our example?
- croupous enteritis
- pseudomembranaceus enteritis
- both are correct
- none are correct

Answer 5

• both are correct

Question 6

Answer 6

diffuse purulent inflammation
phlegmone

diffuse in subcutis

Question 7

Answer 7

diffuse purulent inflammation
phlegmone

yellow: haemostasis
blue: neutrophils
red: lipocytes –> help us to know that we are in subcutis

Question 8

Answer 8

diffuse purulent inflammation
phlegmone

arrow: microthrombosis, not normal in healthy tissue
yellow: vasodilatio, haemaostasis
red: microvascular thrombosis (DIC)

Question 9

Answer 9

diffuse purulent inflammation
phlegmone

collagenolysis, damaged collagen fibers

can also see alot of neutrophils, edemas( fluid)

Question 10

Answer 10

Haemorrhagic inflammation

lumen
the marked area is extravasation

Question 11

Answer 11

fibrinous (croupous) inflammation

Question 12

Answer 12

fibrinous (croupous) inflammation

you can clearly see the three different layers
muscle fibre
small intestine with villius fusion & villius atrophy
fibrin

Question 13

Answer 13

fibrinous (croupous) inflammation
blue : intestine
red: fibrin

Question 14

Answer 14

fibrinous (croupous) inflammation

lymphoplasmocytic propria infiltration

green : plasmacell
yellow: lymphocytes

Question 15

Answer 15

fibrinous (croupous) inflammation
salmonella, you can clearly see the rods

Question 16

Answer 16

lymphoma
round cell tumor

gastric lymphoma of a cat
elimentery lymphoma case

Question 17

Answer 17

lymphoma
round cell tumor

yellow : mimotic figures
red: apopotic cells

you can also see lymphoid cells, you know it is lymphoid cells because they are bigger than RBC.

lymphoid cells are unmature lymphocytes.

Question 18

Answer 18

lymphoma
round cell tumor

yellow: mimotic figures
red: apoptosis, apopotic cells, dying cells

Question 19

Answer 19

Benign mixed tumor
mammary gland

many times it is hormon dependent, can be decreased chance if you spay the bitch early.

Question 20

Answer 20

Benign mixed tumor

green: osteoma
red: chondroma
blue: adenoma ( epithelial part)

Question 21

Answer 21

Benign mixed tumor

green: osteoma
red: chondroma
blue: adenoma ( epithelial part)

Question 22

Answer 22

Benign mixed tumor

myoepithelioma
red marking : spindle shaped cells

Question 23

Answer 23

mast cell tumor
round cell tumor

ulceration, it is very itchy
50% of skin tumor is mast cell tumors

Question 24

Answer 24

mast cell tumor
round cell tumor

you can clearly see the blue mast cells

Question 25

Answer 25

mast cell tumor
round cell tumor

can clearly see the mast cells/ mastocytes, the blue one

Question 26

Answer 26

mast cell tumor
round cell tumor

if it is hard to see you can stain with giemsa, the blue granules are the mast cells

Question 27

Answer 27

melanoma
round cell tumor

malignant, frequently in oral cavity, with bad prognosis, not always pigmented

Question 28

Answer 28

melanoma
round cell tumor

brown is the melanin

Question 29

Answer 29

melanoma
round cell tumor

brown is the melanin

Question 30

Answer 30

Trichoblastoma
epithelial tumor

frequent on head or neck

Question 31

Answer 31

Trichoblastoma
epithelial tumor

medusoid histotype

Question 32

Answer 32

Trichoblastoma
epithelial tumor

Red: medusoid pattern
blue: stroma

Question 33

mammary gland tumors are frequent to occur in dogs, especially in intact bitches
true or false

Answer 33

true

Question 34

mast cell tumors are usually not raised, the skin surface is intact
true/false

Answer 34

false

Question 35

how does lymphocytes & plasmacells look like and how can you differentiate them

Answer 35

lymphocytes: round small nucleus, no cytoplasma visible
plasmacells: oval shape, exentric nucleus means not in centrum