Derm Flashcards
guttate psoriasis is more common in
teenagers
what type of psoriasis is a derm emergency
pustular
what does this suggest
Necrobiosis lipoidica- diabetes
What rash can resemble tinea corporis
granuloma annulare (a delayed hypersensitivity reaction)
Plus gottron’s papules on knuckles and photosensitivity rash on back and chest
Dermatomyositis (an idiopathic inflammatory myopathy)
What is adult-onset dermatomyositis associated with
malignancy
myopathy (myositis)
erythema nodosum
Papule like an insect bite forms a bulla, followed by more bullae and a golden crust
bullous impetigo
what makes perioral dermatitis worse
steroids
does eczema or psoriasis koebnerise
psoriasis only
dark and warty skin in the axillae, groin and neck is what and associated with what
acanthosis nigricans
stomach ca
Pyoderma gangrenosum
pyoderma gangrenosum is associated with what
IBD
RA
Myeloid blood dyscrasias
Chronic active heptatitis
Wegner granulomatosis
Rx for pyoderma gangrenosum as well as steroids
ciclosporin
actinic keratosis can progress to
SCC
Lesion on hand is likely to be SCC or BCC?
SCC- no bcc on hand
Keratoacanthoma
What is Bowen’s disease
very slow growing, can occasionally progress to SCC
xeroderma pigmentosum
xeroderma pigmentosum inheritance
autosomal recessive
xeroderma pigmentosum features
highly sensitive to sunlight
premature skin ageing
prone to skin ca
Eye problems in 80%
seborrheic dermatitis
Seborrhoeic dermatitis has what complications commonly
Otitis externa and blepharitis
seb. dermatitis rx
keratolytics e.g salicylic acid
topical antifungals eg ketoconazole
topical steroids
possible SE of topical corticosteroids in patient with dark skin
hypopigmentation
Molluscum contagiosum with eyelid or ocular involvement and red eye requires
urgent ophthalmology review
Molluscum
Drugs that cause erythema nodosum
Penicillin
COCP
Sulphonamides
(Painful Coloured Shins)
Actinic keratosis rx
topical fluorouracil
Initial psoriasis rx
potent corticosteroid plus vitamin D analogue (calcipotriol)
What drugs may trigger psoriasis exacerbation
‘I need to check my psoriasis IN LAAB’
Infliximab
NSAIDs
Lithium
ACE inhibitors
Antimalarials (chloroquine and hydroxychloroquine)
Beta blockers
Guttate psoriasis is what pathogen
strep
SJS vs TEN vs erythema multiforme
SJS- high mucosal involvement and <10% body area
TEN- >30% body
EM- target lesions, acral distribution (on extremities), mucosal involvement if major
Shingles Mx
oral antivirals should be commenced within 72 hours of onset of symptoms (famciclovir/valacyclovir) unless the patient is < 50 years and has a ‘mild’ truncal rash associated with mild pain and no underlying risk factors
ptyriasis versicolour
ptyriasis versicolour rx
topical antifungal
blisters induced by minor trauma or friction, onset of symptoms is usually in infancy or early childhood
Epidermolysis bullosa - inherited
extremely itchy
dermatitis herpetiformis
dermatitis herpetiformis is related to what
coeliac
pemphigus mx
steroids
pemphigoid rx
topical or oral steroid
tetracycline abx
first line for limited, localised impetigo
hydrogen peroxide 1% cream
(fuscidic acid second line)
purple, pruritic, papular, polygonal rash on flexor surfaces. Wickham’s striae over surface. Oral involvement common
Lichen planus
lichen sclerosis normally affects which area
genital
what type of vascular birth mark does not self resolve
port wine stain/naevus flammeus (assoc Sturge-Weber-Syndrome.)
Can BCCs be referred for routine excision
yes generally unless high risk areas (eyelid, nasal ala) - then urgent
1–2 weeks after a streptococcal infection of the upper respiratory tract,
guttate psoriasis
mildly itchy, herald patch first
ptyriasis rosea
(You can observe the longitudinal diameters of the oval lesions running parallel to the line of Langer)
psoralen + ultraviolet A light (PUVA) therapy risks what complication
SCC
Only one lichen has wickham’s striae- which?
planus
small red patch which develops in the first month of life, increasing in size until around 9 months and becoming more vascular.
capillary haemangioma (Strawberry naevi )- resolves spontaneously
lace like rash caused by heat exposure
erythema ab igne
purplish, lace-patterned discolouration of the skin
livedo reticularis
what is erythema chronicum migrans
the lyme disease rash
pyogenic granuloma
pyogenic granuloma
rx fungal nail infection
if mild- topical treatment with amorolfine 5% nail lacquer
if lot of nails affected- PO terbinafine
drugs causing erythema multiforme
PANCaCes
Penicillin
Allopurinol
NSAIDs
Carbamazepine
COCP
Keloid scar mx
intralesional triamcinolone
Acquired ichthyosis associated with what ca
Lymphoma
acquired hypertrichois lanuginosa associated with what ca
GI and lung
Dermatomyositis associated with what ca
Ovarian and lung cancer
Erythema gyratum repens assoc with what ca
lung
erythroderma assoc with what ca
lymphoma
Migratory thrombophlebitis assoc with what ca
pancreatic
Necrolytic migratory erythema assoc with what ca
glucagonoma
Pyoderma gangrenosum (bullous and non-bullous forms) assoc with what ca
myeloproliferative disorders
Sweet’s syndrome assoc with what ca
haematological
Tylosis assoc with what ca
oesophageal
+ IDA
Hereditary haemorrhagic telangiectasia
Rose spots on abdomen
salmonella typhi infection
C. psittaci infection
