Dermalology

Question 1

Lupus vulgaris

Answer 1

Secondary to pulmonary TB

Scaling, erythematous, plaque-like rash on the extensor surfaces

Question 2

Dermatitis herpetiformis

Answer 2

Often with COELIAC disease

Diffuse, symmetrical rash, extensors, excoriated/erythematous, papular and vesicular

Question 3

Stevens-Johnson syndrome

Answer 3

‘Malignant’ erythema nodosum involves MUCOUS MEMBRANES + EYES

Question 4

Herpes zoster virus

Answer 4

Dermatomal, vesicular rash

Reactivation rash –> treat with ACICYLOVIR

Question 5

What is the difference between pemphigoid and pemphigus?

Answer 5

PemphigoiD = Dermis (not mucous mebranes)
PemphiguS = Superficial vlisters (mucous mebranes)

Question 6

Erythema nodosum

Answer 6

Painful, erythematous, tender rash mostly on ANTERIOR SHINS - lesions are ill-defined and can coalesce

Hodgkin’s, TB, EBV, Sarcoidosis, Streptococcus

Question 7

Erythema multiforme

Answer 7

‘Target’ lesions, mostly peripheral

MUSSH

Mycoplasma, UC, SLE, Streptococcus, HSV

Question 8

Pyoderma gangrenosum

Answer 8

Necrotising, ulcerating lesion that usually starts as papular and pustular areas –> form one necrotic ulcer

Wegener’s granulomatosis, Myelofibrosis, Waldenstrom’s, AnkSpond, UC

Question 9

Prognostic factors of malignant melanoma

Answer 9

ABCDE

Asymmetry
Border irregularity
Colour irregularity (WITHIN mole)
Diameter >7mm
Evolution of lesion