Card Set Information
what are the 10 main parts to the HPC of a dermatology patient?
: longstanding, enlarging (BCC), childhood (eczema), sudden onset (drug eruption)
: sun exposed (melanoma), hands (contact dermatitis), extensors, flexors
3. what looked like & how changing (melanoma)
: sunlight in lupus
6. impact on QOL
: acne psych/relationships
7. Rx already tried
: emollient, photo, topical steroids, systemic
8. risk factors
: sun exposure (sailor, gardener, australia, red hair blue eye)
9. atopic history
: asthma, eczema, hayfever
10. previous malignancy
: recurrent BCC, metastasic disease
what are the 4 things to include when describing a skin lesion?
what are the 7 main different descriptions?
what is a macule?
skin discolouration - white (loss of melanin), erythema (vascular dilatation+inflamm)
what is a patch?
larger than macule
what is a papule?
elevated lesion <0.5cm
what is a nodule?
elevated lesion >0.5cm
what is a plaque?
what is a vesicle
fluid filled lesion
eg herpes simplex
what is a pustule?
pus filled lesion eg acne
what is a bulla?
fluid filled lesion
eg after insect bite reaction
what are the 5 different surface characteristics of a skin lesion?
what is scale?
visible, palpable flake of aggregated EPIDERMAL CELLS
what is crust?
what is lichenification?
hard thickening of the skin with accentuated skin markings
reaction to long standing scratching and inflammation
what is an excoriation?
superficial ulceration secondary to scratching
loss of epidermis
what is a nummular lesion?
coin like lesion
what is the difference between an ulcer and an erosion?
: superficial loss of EPIDERMIS that heals without scarring
: loss of whole thickness of epidermis and upper dermis
healing results in scar
what are the different distributions?
: eg wrists
what are the different forms of a generalised rash?
peripheral v central
: endogenous or exogenous from hairdresser or nurse with gloves
: exogenous - chef with knife in dominant hand
what are the 5 different morphologies?
: all look same
: eg looks different
: eg HSV, insect bites
: tinea corporis
: eg psoriasis
which rash can be described as pleomorphic?
what are the 3 main skin conditions that show koebnerisation?
which 3 other places should you examine in dermatology?
pedal pulses - leg ulcers
what is the difference between patch testing and prick testing?
patch testing places substances on the SURFACE of the skin
identifies SKIN allergies
prick testing tests for allergies that don't necessarily occur on skin eg allergy to pollen, foods,
what is the difference in hypersensitivity reactions between patch and prick testing?
: cell mediated type IV hypersensitivity eg hair dye, nickel, latex - contact dermatitis
: IgE mediated, type 1 hypersensitivity - mast cells have IgE receptors and degranulate
what investigations can be done in derm?
1. photograph the skin lesion to monitor changes
: magnifying glass- see different LAYERS of skin
: eg fungus - need to confirm the diagnosis as it is 6-8 weeks of oral Rx
4. swabs - microbiology/PCR for viral
: histology/stains/immunofluorescence studies