Describing dermatological lesions

Question 1

Vitiligo

Answer 1

Well-demarcated, depigmented macules and patches distributed in a non-segmental pattern.

Question 2

Erythema multiforme

Answer 2

Multiple, symmetrically distributed, well-demarcated targetoid papules and plaques involving the dorsal hands, forearms and feet.

The lesions exhibit a dusky zone surrounded by a pale ring and an erythematous outer border, consistent with erythema multiforme.

Question 3

Psoriasis

Answer 3

Multiple well-demarcated erythematous plaques covered with silvery-white scaling, predominantly on the extensor surfaces of the elbows, knees and lower back.

The lesions are symmetrically distributed and exhibit Auspitz sign when the scales are removed.

Question 4

BCC

Answer 4

Well-demarcated, pearly nodule on the nasal bridge. The lesions exhibits prominent telangiectasia and a smooth, transulcent surface.

Question 5

Melanoma

Answer 5

Singular, asymmetricaly irregularly pigmented patch with multiple shades of brown. The lesion has poorly defined, irregular borders.

Question 6

SCC

Answer 6

Poorly defined scaly nodule with central ulceration and crusting. The lesion has an irregular border, is erythematous with areas of hyperkeratosis.