Dermatology

Question 1

conditions associated with acanthosis nigricans

Answer 1

anorexia nervosa
gastric cancer
T2DM
cushing’s
PCOS

Question 2

violaceous, polygonal papules and plaques with some overlying white scale, on the palms and flexor surfaces of the arms. Close examination of the hands also reveals mild oncodystrophy. management

Answer 2

lichen planus
topical betamethasone
(benzydamine mouthwash if oral presence)

Question 3

fungal toenail infection tx

Answer 3

candida: oral itraconazole
Trichophyton rubrum: oral terbinafine

Question 4

young female with a photosensitive small, erythematous papule on her left cheek that then became scaly and well-defined, with central atrophy and adherent scaling.

Answer 4

discoid lupus

Question 5

dermatological manifestations of systemic diseases

Answer 5

• derm herp: coeliac
• acan nig: GI malignancies, diabetes, cushing
• pyoderma gangrenosum: crohns
• sub derma: parkinsons
• erythema multiforme: HSV, SLE, sarcoid
• erythema nodosum: IBD

Question 6

lesion consisting of histiocytes, vessels and fibrotic changes at trauma site

Answer 6

dermatofibroma

Question 7

eczematous lesions on the sebum-rich areas: scalp (may cause dandruff), periorbital, auricular and nasolabial folds
otitis externa and blepharitis may develop

diagnosis + mx

Answer 7

subhorroeic dermatitis

Malassezia furfur

ketoconazole

Question 8

sedating & non-sedating antihistamine

Answer 8

chlorphenamine
loratadine