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Dermatology > Fungal/Infestation > Flashcards

Flashcards in Fungal/Infestation Deck (11):
1

fungal infections

moulds
yeast
dimorphic

supf
subcut
deep/systemic

2

dermatophytes

unilateral, annular, circ'd, central clearing, red concentric border, scaling, infectious

corporis: body
cruris: groin (creases)
manuum: proximal from wrist, asymmetical
pedis: pustules and erythema on sole, white maceration between toe webs
capitis: Afro-C; genetics; Kerion swelling (persistent infection)
unguium: white discolouration, onycholysis, plate loss, hyperkeratosis

3

investigations

skin scrapings (Scale)
nail clippings/subungal debris
plucked hairs
UV/wood's light

4

treatment - overview

topical: localised; azoles, terbinafine

systemic: widespread, hair/scalp/nails,immo; terbinafine, itra/fluconazole, griseofulvin (kids)

5

differentials

psoriasis: nail pitting, no central clearing
candida: moist, itchy, peeling, papules/pustules
dermatitis: scaling throughout, no clearing
erythrasma: fluoro
pityriasis rosea: herald
pityriasis versicolor: pigmentation, variable colour

6

erythrasma

bacterial (ABx -erythromycin)
erythema, fine scaling
defined patch/plaque
coral pink fluoro

7

candidiasis

very common
erythema extending from skin folds
satellite lesions and pustules at edges
moist and itchy

Rx: polyenes (nystatin/amphoB) or clotrimazole (top) or fluconazole (PO)

8

pityriasis versicolor (malassezia)

yellow/brown/variable/hypopigmented macules
usually truncal
fine scaling

Rx: topical miconazole/itraconazole

9

seborrhoeic dermatitis (malessezia)

sweaty areas: upper back, face, scalp, flexure
symmetrical

salmon-pink scaly plaques, ill-defined
sun helps (worse in winter)

Rx: azoles (top) steroids, 'limus' (top immomod)

10

scabies

pruritus + excoriation (mite faeces)
trunk, digit webs, wrist
burrow marks
blistering hands/soles in kids

11

headlice

eggs/nits and live lice in hair
erythema, papules, excoriations