Derm Lecture 1

Question 1

What is the word for itching, must be able to spell-

Answer 1

PRURITUS (measured on a scale from 1 to 10- 10 being severe!)

Question 2

Bilateral symmetric lesions are usually due to:

Answer 2

Internal disorders (endocrine), autoimmune disorders (Pemphigus foliaceus), allergies

Question 3

Asymmetric lesions are usually due to

Answer 3

parasites, contact allergens, neoplasia, infections

Question 4

Initial eruptions that develop spontaneously as a direct reflection of underlying disease is called…

Answer 4

Primary lesion

Question 5

Primary lesions often appear quickly and disappear rapidly, leaving a _____ ___

Answer 5

secondary lesion

Question 6

What are the papule differentials**

Answer 6

Folliculitis including:

• Demodicosis (Demodex canis)- scrape
• Dermatophytosis- pluck, ringworm
• Bacterial- smear

Question 7

Papules are usually associated with _____

Answer 7

follicles

Question 8

papule vs plaque

Answer 8

papule is a small, solid elevation of the skin up to 1 cm in diameter, can be palpated
Plaque is a larger- flat topped elevation formed by extension or coalition of papules

Question 9

Define pustule:

Answer 9

A small, circumscribed elevation of the epidermis that is filled with pus, can be yellow, green, red. can be follicular, intraepidermal or subcorneal
“acne”
If it ruptures and leaves a crust- secondary lesion

Question 10

Most common bacterial skin lesion is…

Answer 10

Staphylococcus pseudointermedius

Question 11

What is the most common sterile pustule?

Answer 11

Pemphigus foliaceus

Question 12

Macule vs. patch-

Answer 12

Macule is well circumscribed flat area of COLOR CHANGE at less than 1 cm, patch is the same but more than 1 cm

Question 13

How is vesicle different than bulla?

Answer 13

Vesicle is small and bulla is big

Question 14

what is a sharply circumscribed elevation of epidermis filled with clear fluid and less than 1 cm? What about if its more than 1 cm?

Answer 14

vesicle; bulla

Question 15

Circumscribed solid elevation greater than 1 cm that is usually extended into deeper layers of skin and is inflamm or neoplastic is called a _____

Answer 15

nodule

Question 16

What is the term for an epithelium lined cavity containing fluid or solid material that is smooth, well-circumscribed fluctuant to solid mass usually originating from hair follicles or other structures in the skin???

Answer 16

Cyst

Question 17

Partial hair loss is called ____

Answer 17

Hypotrichosis

Question 18

Scale is accumulation of cornified cells (____ _____) aka dandruff that can be primary or secondary

Answer 18

stratum corneum

Question 19

are crusts adhered to skin?

Answer 19

yes , because if not adhered then they are called scales

Question 20

What are follicular casts?

Answer 20

Accumulation of keratin and follicular material that adheres to the hair shaft and extends above the follicular ostia

Question 21

Inflammation of sebaceous gland– keratin hair follicles accumulate– ______ ___-

Answer 21

follicular cast

Question 22

Comedone or Comedo

Answer 22

Dilated hair follicle filled with cornified cells and sebaceous material
“Black head”

Question 23

Primary comdeone aka

Answer 23

feline chin acne

Question 24

Secondary comedone aka

Answer 24

Demodicosis, hypercortisolemia

Question 25

What are two common reasons for comdeones in dogs?

Answer 25

Cushings or on steroids (increased steroids in system) or demodex

Question 26

immune mediated destruction of melanocytes is what type of change in pigmentation?

Answer 26

primary- vitiligo

Question 27

Define:

1. Leukotrichia
2. melanotrichia-
3. Aurotrichia-

Answer 27

1. leukotrichia- lack of pigment in the hair
2. melanotrichia- excess pigment in the hair
3. Aurotrichia- gold color change to the hair

Question 28

What is a special type of scale arranged in a circular rim of loose keratin flakes or peeling keratin

Answer 28

epidermal collarette

Question 29

what is the pathophys of an epidermal collarette?

Answer 29

Remnant of roof of a vesicle, bulla, pustule, papule, or hyperkeratosis caused by inflammation

Question 30

number one differential for epidermal collarette is…

Answer 30

immune mediated

Question 31

difference between lichenification and hyperkeratosis:

Answer 31

Thickening and hardening of skin, exaggeration of superficial skin markings (usually hyperpigmented) and hyperkeratosis is increased thickness of stratum corneum and usually on nose and paw pads

Question 32

Erosion caused by self trauma is called

Answer 32

Excoriation

Question 33

Erosion vs ulcer

Answer 33

Erosion is more shallow than ulcer