Derm

Question 1

What scoring system is most important as pathological prognostic indicator?

Answer 1

Breslow depth

Question 2

Kobener phenomenon and most likely underlying cause

Answer 2

Well-defined areas of scale formation at the sites of minor skin injuries
Most common cause: psoriasis

Question 3

Most common pathogen in leg cellulitis

Answer 3

Streptococcus pyogenes

Question 4

Drug trx for urticaria

Answer 4

Loratadine

Question 5

What is Bowen’s disease and how would it be treated topically?

Answer 5

Squamous cell carcinoma in situ (v early form)
Characterized by the development of slow-growing, red, scaly patches on the skin.
Mx: 5-fluorouracil (Efudix) cream

Question 6

Basal cell carcinoma
1) Appearance
2) Location
3) Growth

Answer 6

1) Appearance: raised, pearly bumps or pinkish patches with a rolled border and small blood vessels on the surface. They may ulcerate or form a scab in the centre
2) Location: sun-exposed areas of the skin, such as the face, neck, and upper torso
3) Growth: grow slowly and may take months or years to reach a significant size

Question 7

Squamous cell carcinoma
1) Appearance
2) Location
3) Growth

Answer 7

1) Appearance: Can appear as firm, scaly or crusted bumps or patches with a red, inflamed base. They may ulcerate and bleed.
2) Location: Often found on sun-exposed areas of the skin, such as the face, neck, hands, and arms
3) Growth: May grow more rapidly than BCCs and can invade deeper layers of the skin if left untreated

Question 8

Malignant melanoma
1) Appearance
2) Location
3) Growth

Answer 8

1) Appearance: Various appearances but usually present as asymmetrical, irregularly shaped moles or spots with an uneven color and border. They may be black, brown, red, or multiple colors
2) Location: Anywhere
3) Growth: Can grow quickly and may appear to change in size, shape, or color rapidly

Question 9

Acne mx

Answer 9

1. Topical retinoid
2. Topical abx
3. Lymecycline
4. Isotretinoin

Question 10

Which pathogen is responsible for thin-walled blisters that then ruptured, leaving yellow crusted lesions?

Answer 10

Staph aureus (IMPETIGO)

Question 11

Eczema herpeticum mx

Answer 11

PO acyclovir

Question 12

Scabies features

Answer 12

• Intensely itchy rash
• Excoriated papules across body
• Contact w others also with rash

Question 13

Scabies mx

Answer 13

5% permethrin

Question 14

Rosacea features

Answer 14

rasha round nose/cheeks with pustules + red eyes w gritty feeling

Question 15

Rosacea mx

Answer 15

Ivermectin cream

Question 16

Scaly, thick plaques on sun exposed areas

Answer 16

actinic/solar keratosis

Question 17

flat, light brown plaques + waxy surface often scalp/back

Answer 17

sebhorreic keratosis

Question 18

hard, raised growth w/ ulcerated centre

Answer 18

keratoacanthoma

Question 19

What changes warrant a 2ww referral for derm?

Answer 19

> =3 points
Major (2 points each)
- Change in size
- Irreg colour
- Irreg shape
Minor (1 point)
- diameter >7mm
- inflamm
- oozing
- change in sensation

Question 20

Assessment method for skin ca

Answer 20

Breslow thickness
-Excision biopsy-
Stage I: <2mm
-Sentinel lymph node biopsy-
Stage II: <4mm
Stage III: any nodal involvement
- met screen-
Stage IV: any mets