Derm

Question 1

Actinic keratosis

Answer 1

Caused by chronic UV exposure or radiation
Ill-defined irregular macules/ plaques on sun exposed areas
Treat with cryosurgery, fluorouracil or imiquimod. If many ?chemical peel, if thick ?curettage

Question 2

Malignant melanoma

Answer 2

UV exposure, some genetic predispos.
ABCDE or ugly duckling lesion, bleeding
dermatoscopy + excision biopsy
wide local excision, ?SLNB
consider adjuvant systemic therapy

Question 3

Lentigo malignant melanoma

Answer 3

presents as a patch of discoloured skin that grows slowly and becomes more atypical over time, often over years

Question 4

Psoriasis

Answer 4

Discrete erythematous papules with silver scale. Manage with topical corticosteroid and vit D analogue. If moderate to severe, consider UV phototherapy. Else consider methotrexate, ciclosoprin or biologics.