premalignant Flashcards
MC site for basal nodular and superficial?
nodular: nose
superficial: trunk
what is the MOA for 5 fluorouracil treatment?
thymidylate synthatse inhibitor: the necleoside required for DNA replication
what is the most imporant risk factor for basal cell carcinoma?
inability to tan
risk factors for SCC?
chemo, UVA/UVB, HPV, thermal/radiation burns, chronic irritation, arsenic
how long is 5FU treatment and how long may irriation last?
2-4 week treatment, irritation 2-4 weeks
scc
bowen’s disease
basal cell carcinoma
meds that are used w/ 5 FU treatment?
OTC HC 1% or Rx desonide cream
aquaphor/pertrolatum
oral analgesics
prescribe in winter or fall
what is the treatment for bowen’s?
small: electrodessication and curettage, cryo, excision
large: excision, 5-FU
q 6 month follow up
recurrence is common
what is MC invasive skin CA?
basal cell carcinoma
what cuases actinic keratosis, where is it confined to, what is it a precursor to, what is its treatment?
chronic uvb, confined to epidermis, scc,
photoprotection, complete skin exam, liquid nitrogen if few, 5-f/u if multiple
actinic keratosis
what is actinic keratosis on the ear and what is the treatment?
chondrodermatitis nodularis helicis
excies it speciall pillow for sleeping
what is actinic ketatosis on the lip called?
actinic chelitits