Dermatology

Question 1

Most common malignancy associated with acanthosis nigricans?

Answer 1

Gastric adenocarcinoma

Question 2

Painful skin ulceration associated with IBS, RA, SLE, and haematological disorders?

Answer 2

Pyoderma gangrenosum

Question 3

Acne vulgaris in pregnancy if treatment needed?

Answer 3

Erythromycin

Question 4

Most common type of melanoma that has the typical diagnostic features of a changing mole:

Answer 4

Superficial spreading melanoma. Occurs at sites of intermittent intense sun exposure.

Question 5

4 diagnostic criteria of Hereditary Haemorrhagic Telangiectasia (Osler-Weber-Rendu):

Answer 5

1. Epistaxis
2. Telangiectases (lips, oral cavity, fingers, nose)
3. Visceral lesions: gastrointestinal telangiectasia, pulmonary, hepatic, cerebral, spinal AVMs
4. Family history: a first-degree relative with HHT

Question 6

Psoriasis exacerbating drugs:

Answer 6

Beta blockers, lithium, antimalarials, NSAIDs and ACE inhibitors, infliximab.

Question 7

What may cause guttate psoriasis and what is the treatment?

Answer 7

Streptococcal infection 2-4 weeks before onset. Reassurance + topical treatment if symptomatic.

Question 8

Impetigo treatment, 1st and 2nd line:

Answer 8

Hydrogen peroxide 1%, 2nd fusidic acid.

Question 9

Lichen planus treatment:

Answer 9

Topical clobetasone butyrate (potent steroids).

Question 10

Scaly lesions that develop after chronic sun exposure and are premalignant, and treatments:

Answer 10

Actinic keratoses. Topical fluorouracil or diclofenac.

Question 11

Elder, tense blisters without mucosal involvement?

Answer 11

Bullous pemphigoid

Question 12

Multiple hypo or hyperpigmented patches, itchy, scaly, more noticeable after suntan, caused by Malassezia:

Answer 12

Pityriasis versicolor

Question 13

Mild-moderate rosacea treatment:

Answer 13

Topical ivermectin, then oral doxycycline

Question 14

Child with atopic eczema with sudden worsening, painful blisters/punched out erosions around mouth and neck. Diagnosis and treatment:

Answer 14

Eczema herpeticum, IV aciclovir.

Question 15

Patient with coeliac disease, itchy vesicular lesions on extensor surfaces, biopsy shows IgA deposition:

Answer 15

Dermatitis herpetiformis

Question 16

Flexural psoriasis treatment:

Answer 16

Mild-moderate topical corticosteroids for up to 2 weeks.

Question 17

Shiny painless plaques with telangiectasias on the shins of a middle-aged diabetic woman:

Answer 17

Necrobiosis lipoidica

Question 18

Old man with a tender, well-demarcated nodular lesion in the ear that has not grown in months:

Answer 18

Chondrodermatitis nodularis helicis

Question 19

Young female with blisters/vesicles in both hands, intensely itchy and burning with some desquamation, worsen in summer:

Answer 19

Pompholyx (dishidrotic eczema)