Dermatology

Question 1

What is Auspitz sign

Answer 1

Seen in psoriasis- pin point bleeding on scraping of lesions

Question 2

What is demodex?

Answer 2

Mite involved in rosacea
First line (mild) - topical ivermectin/metronidazole
Mod-severe- doxycycline/oxydoxycycline
If redness predominant- Brimonidine

Question 3

Types of psoriasis?

Answer 3

Plaque and guttate

Question 4

Distribution of psoriasis

Answer 4

Extensor surfaces

Question 5

The Ps of Lichen planus

Answer 5

Purple
Polygonal
Pruritic

On flexor surfaces

Question 6

Wgat is Breslow thickness? Its importance

Answer 6

Degree of invasion of BCC, determines its prognosis

Question 7

Type of ulcer seen in basal cell carcinoma?

Answer 7

Rodent/pearl ulcer- central depression, raised edges

Question 8

How do you treat cellulitis if the patient has a penicillin allergy?

Answer 8

Give an aminoglycoside- clarithromycin

Question 9

What layer of the skin does celluilitis affect?

Answer 9

The dermis

Question 10

Whats the dofference between cellulitis and erysipelas?

Answer 10

Erysipelas affects the upper skin (face-leg-arms) and has sharp borders.
Cause predominately by strep.
Both are however treated the same way

Question 11

What pattern of lesion does lichen planus have in the mouth?
Where does it stay?

Answer 11

White lacy pattern
-wickham striae
Located at the sodes of the tongue and buccal mucosa

Question 12

Can oral lichen planis be painful?

Answer 12

Yes. Its called Erosive lichen planus

Question 13

How do you treat lichen planus?

Answer 13

Topical steroid (T cell mediated) and oral antihistamine (intensely pruritic)

Question 14

How do you treat hives?

Answer 14

Limit antigen exposure
Antihistamines ( remember the culprit is histamine leading to vasodilation and leaky vessels)
Calamine lotion
Oral steroids if needed

Question 15

Distribution and appearance of psoriasis?

Answer 15

Extensor surfaces, well demarcated plaques with ovelying white/silver film/scales
Very itcy

Question 16

Treatment of psoriasis

Answer 16

Emollients
Topical steroids
Vit D analogues

2nd line- PUVA

Question 17

Difference between psoriatic arthritis and RA?

Answer 17

RF is negative

Commonly affects DIP jt

Question 18

Atopic dermatitis features?

Answer 18

Occurs in flexures of the body
Usually in response to an allergen
History of an atopic disease- asthma, hay fever

Question 19

Treatment of atopic dermatitis

Answer 19

Emollients + topical steroids
Mild steroids- hydrocortisone acetate
Moderate- Betamethasone 0.025, clobetasone
Potent- Betametasone 0.1%, mometasone furoate, hydrocortisone
Very potent- Clobetasol

Question 20

Distribution of Seborrheic dermatitis

Answer 20

Occurs in areas with sebaceous glands- trunk, face, scalp

Question 21

Treatment of seborrheaic dermatitis

Answer 21

Ketoconazole, selenium shampoos
Steroid cream in severe cases
Also, topical antifungals

Question 22

Ehat is thepathophysiology of seborrheic dermatitis

Answer 22

The body reacts to the presence of malassezia in the sebaceous glands

Question 23

Liche sclerosus

Answer 23

White plaques over the anogenital region- anus, labia, glans, etc

Question 24

What is the ABCDE of malignant melanoma?

Answer 24

A- asymmetry 
B- irregular borders 
C- comour change/irregularity 
D- Diameter >/= 7mm
E- Evolving

Question 25

What to do when you see malignant melanoma?

Answer 25

Refer urgently to dermatology!