Name three premalignant conditions of SCC?
Actinic lentigines
Bowens disease
HPV viral precursor
What type of HPV is associated with penile SCC?
HPV 16
How does actinic lentigines arise?
chronically UV exposed skin in white adults
What do actinic lentigines look like?
epidermal dysplasia with overlying parakeratosis
red or brown spots
What does Bowens disease look like?
red discolouration, typically on lower leg
Which group of people is most likely to get Bowens disease?
middle aged and elderly
SCCs on which part of the body gives a higher chance of metastasises?
lip and scalp
Where do SCCs arise from?
suprabasal layer
on sun exposed skin
or sites of ulceration, burns of lupus vulgaris
What are the characteristic features of SCCs?
warty or crusty lump/ulcer
can bleed
can be painful
What is a Keratocanthoma?
a self resolving form of SCC
What are treatment options for SCCs?
skin biopsy then: elliptical excision punch biopsy curettage shave excision