Derm Flashcards
what is Hereditary haemorrhagic telangiectasia:
Osler-Weber-Rendu syndrome,
Autosomal dominant condition characterised by multiple telangiectasia over the skin and mucous membranes.
sx of HHT
can cause pulmonary, hepatic, cerebral and spinal Arteriovenous malformations leading to bleeding
- haemoptysis
- epistaxis
what is a keratoacanthoma
BENIGN EPITHELIAL TUMOUR
who is keratoacanthoma common in
elderly
describe keratoacanthoma
small, dome shaped papule
crater filled with keratin
how doess keratoacanthoma grow
rapid growthh phase (1 week)
usually regresses after 3 months leaving a scar
how do you manage keratoacanthoma
URGENT EXCISION and histology
as difficult to exclude SCC
whhat is Bowens disease
precancerous dermatosis precursor to SCC
what does Bowens disease look like
red scaly patch
10-15 cm in size
slow growing
on sun exposed areas
how do you mx Bowens disease
topical 5-fluorouracil
cryotherapy
excision
what is pompholyx (dishydrotic) eczema
intensely pruritic rash on palms and soles
risk factors for seborrhoeic dermatitis
immunosuppression (HIV)
neuro (down’s, PD, epilepsy)
criteria for melanoma dx
MAJOR: change in size and shape and colour
MINOR: diameter >7mm, inflamm, ooziing, bleeding, change in sensation
what are the four types of melanoma
superficial soreadung
nodular
lentigo maligna
acral lentigionous
Which melanomas present like a growing mole,. and how do you set them apart
superficial spreading - young people
lentigo maligna - old people
