Dermatology (E1) Flashcards Preview

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Flashcards in Dermatology (E1) Deck (64)
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1

Which last longer, primary or secondary dermatology lesions?

Secondary

2

Which primary skin lesions are >1cm large?

Patches
Plaques
Bulla

3

What is a flat spot <1cm on the skin with a change in color? What if it is >1cm? Primary or secondary lesion?

Macule

Plaque

Primary

4

What primary skin lesion term describes a mosquito bite?

Papule

5

What do you call a sharply delineated lesion of edema?

Wheal

6

What is the genetic defect that results in the collagen fibers in the skin having an abnormal structure resulting in weak skin that is extremely stretchy?

Cutaneous asthenia (Ehlers-Danlos syndrome, Collagen dysplasia)

7

What type of skin scrape would you do to look for sarcoptes or notoedres?

Superficial skin scrape

8

What test would you perform to look for hyphae or spores from ringworm or to look for lice?

Trichogram

9

What quick test can you perform to look for bacteria, fungi and yeast on the surface of the skin?

Scotch tape test

10

What range of needle gauges can you use to perform FNA?

21-23G

11

What do you call a type of macule caused by bleeding into the skin?

Purpura, petechia or echymoses

12

How long must a Woods lamp be on before using it? Why?

5-10min

Correct wavelength must be reached

13

Which of the following is NOT an indication for performing a culture for bacterial pyoderma?
-Cytology showing a mixed population or just rods
-Deep pyoderma
-Unresponsive cocci infection despite correct antibiotic use
-Severe bleeding and swelling that is unresponsive to treatment
-GSD pyoderma

Severe bleeding and swelling that is unresponsive to treatment

14

What is the Gold Standard for identifying environmental allergens?

Intradermal allergy testing

15

What is allergy testing serology not reliable for?

Food

16

If you do not see fleas on a patient but suspect FAD, what other test can you perform? What is the definitive diagnostic test?

Flea dirt test

Flea antigen test (involving 3 injections- negative control, positive control and flea allergen)

17

What do you cal at coalition of papules forming a flat-topped elevation?

Plaque

18

What do you call an accumulation of keratin and sebaceous material stuck to a hair shaft?

Follicular cast

19

What is the difference between an erosion and an ulcer?

An ulcer is a break in stratum basale with exposure of the dermis, while an erosion is shallow and doesn't break the basal layer

20

What does it indicate if your DTM media turns red at the same time that the dermatophyte colony appears?
What if it appears a few days after the colony appears?

Pathogenic fungus

Non-pathogenic/saprophytic fungus

21

What can cause false positives with a Woods lamp?

Keratin scales
Soaps
Dyes
Certain medications

22

What is used for the positive and negative controls in intradermal allergy testing?

Positive- Histamine, Negative-Saline

23

What do you call a small elevation of epidermis filled with pus? Filled with clear fluid?

Pustule
Vesicle

24

What is the accumulation of loose fragments of the horny layer of skin called?

Scale

25

What do you call a linear abrasion of the skin? Is this a primary or secondary lesion? What if the linear lesion cleaves the epidermis or dermis, what is that called? Is that primary or secondary?

Excoriation- secondary

Fissure- secondary

26

What is the unpleasant sensation of the skin that provokes the urge to scratch? Also spell it.

PRURITIS
(Prur-itis)

27

Name 2 commensal organisms found on dog skin.

Staph pseudintermedius
Malassezia

Cryptococcus
Epiccocum
Candida

28

What is the secondary lesion that involves thickening and hardening of the skin called?

Lichinification

29

What do you call a >1cm solid raised palpable lesion that could include an abscess? Also, what is an abscess?

Nodule

Abscess- fluctuant lesion in dermis or SQ from pus

30

What type of skin scrape would you do to look for most demodex species in dogs?

Deep skin scrape