Benign and pre-malignant skin conditions Flashcards
What cells are seborrheic keratosis derived from?
keratinocytes
Appearance of seborrheic keratosis
warty growths with a stuck on appearance
variable
multiple angiomas
How are seborrheic keratosis treated?
usually left unless problematic and then would do cryotherapy or curettage
What is cryotherapy?
freeze with liquid nitrogen
pros of cryotherapy
cheap and easy to perform on the day
Cons of cryotherapy
scar, failure/recurrence and no pathology result
What is leser trelat?
paraneoplastic
abrupt onset of widespread seborrheic keratosis
What can leser trelat signify?
underlying solid organ malignancy eg GI adenocarcinoma
What is the cause of viral warts?
HPV
Treatment of viral warts
not treated in children
clear when immunity develops
cryotherapy or wart paints can stimulate immune system slightly
curette if severe
Define a cyst
encapsulated lesion containing fluid or semi-fluid material
How do cysts feel?
firm and fluctuant
List some types of cysts
epidermoid pilar dermoid steatocystoma hidrocystoma ganglion
Treatment of cyst and what to do if it becomes infected
excision
antibiotics, intralesional steroid, incision and drain
What is a dermatofibroma?
benign fibrous nodule often on limbs due to proliferation of fibroblasts
Appearance of deramtofibroma
firm nodule, tethered to skin but mobile over fat
pale pink/brown - paler in centre
What test is positive in dermatofibroma?
dimple sign
Management of dermatofibroma
asymptomatic usually but may be itchy or tender but if symptomatic can excise
Define lipoma
benign tumour of fat cells
Texture of lipoma
smooth and rubbery subcutaneous mass
What would you be considering if a lipoma is tender?
angiolipoma
liposarcoma
What is an angioma?
overgrowth of blood vessels in the skin due to proliferating endothelial cells
Groups of people angiomas are found in
all ages
pregnancy and liver disease
Appearance of pyogenic granuloma
Rapidly enlarging red raw growth at site of trauma
bleed
