Scaling and Crusting

Question 1

Define scale and crust

Answer 1

S - accumulation of loose cornified fragments of the stratum corneum

C - presence of a dried exudate on the skin surface

Question 2

What are the layers of the epidermis?

Answer 2

1. Stratum corneum
2. Stratum granulosum
3. Stratum spinosum
4. Stratum basale

Question 3

Define seborrhoea sicca, serborrhoea oleosa and seborrhoeic dermatitis…

Answer 3

SS - dry scaling
SO - oily scaling
SD - greasy, inflamed skin

Question 4

What is the dominant clinical sign of keratinisation/cornification?

Answer 4

Follicular casts

Question 5

What is keratinisation/cornification most commonly caused by?

Answer 5

Secondary to:
Parasites
Infections
Nutrition
Allergy
Neoplasia

Question 6

What breed of dog suffers from sebaceous disorder => scaling?

Answer 6

Cocker spaniels

Question 7

What are the DDx for dogs with abundant follicular casting?

Answer 7

Demodex
Primary keratinisation defect
Sebaceous adenitis

Question 8

What is the DDx for dogs with abundant comedones?

Answer 8

Demodex
Primary keratinisation defect
Endocrinopathy

Question 9

What can trigger epidermal inflammation leading to crust?

Answer 9

Trauma
Infection
Infestation