Skin Cancer Flashcards
How many people will develop basal cell carcinoma in a class of 100?
25
How many people will develop squamous cell carcinoma in a class of 100?
10
How many people will develop melanoma in a class of 100?
3-4
What are the types of skin cancer?
Melanoma and non-melanoma
What are the types of non-melanoma?
Basal cell carcinoma and squamous cell carcinoma
What type of cancer is melanoma?
Melanocyte cancers
What type of cancer is non-melanoma?
Keratinocyte cancers
What are the features of basal cell carcinoma?
Slow growing, painless, and rolled pearly edge
What are the types of basal cell carcinoma?
Nodular, superficial, pigmented, morpheic, and basosquamous
What are the risk factors for developing basal cell carcinoma?
Fair skin, intermittent UV exposure, personal history of BCC, prior treatment with ionising radiation, genetic syndromes such as nevoid BCC syndrome, chronic arsenic exposure, and immunosuppression
What is the peak age of basal cell carcinoma?
Approximately 70 years
What is the surgical management of basal cell carcinoma?
Simple standard excision, flap surgery, MOHS surgery
What is the destructive management for basal cell carcinoma?
Electrodessication and curettage, cryotherapy, lasers, and radiotherapy
What is the topical management of basal cell carcinoma?
Topical 5-FU, imiquimod, and photodynamic therapy
What is topical 5-FU?
Topical 5-fluorouracil
What is the systemic management for basal cell carcinoma?
Chemotherapy, retinoids, new target therapy (SMO-inhibitors)
What are the features of squamous cell carcinoma?
Quick growing and painful
What are the causes of squamous cell carcinoma?
UV radiation exposure, increasing age, male at birth, lighter skin, tobacco, alcohol, and HPV infection
What is ultraviolet A (UVA)?
Longer wavelength, aging
What is ultraviolet B (UVB)?
Short wavelength, burning
What do UVA and UVB cause?
DNA damage and mutation
What can even one sunbed session increase your risk of developing squamous cell carcinoma by?
67%
What can even one sunbed session increase your risk of developing basal cell carcinoma by?
29%
What do using sunbeds for first time before age of 35 increase your risk of melanoma by?
60%
What is the effect of one blistering sunburn in childhood or adolescene?
More than doubles your chances of developing melanoma later in life?
What are the Fitzpatrick skin types?
Pale white skin, white skin, light brown skin, moderate brown skin, dark brown skin, and deeply pigmented dark brown to black skin
What do all skin colours have the same number of?
Melanocytes
What is the difference in light and dark skin?
The number of melanosomes
Why is dark skin dark?
Tyrosine kinase polymerization and 1 melanocyte: 5 keratinocytes
What is the function of melanocytes?
Produce melanin, which absorbs UV waves and prevents DNA damage to the keratinocytes
What is the function of keratinocytes?
Stimulate melanocyte functions such as proliferation, differentiation, and melanogenesis
What are the five ways to protect yourself from skin cancer?
Slip, slip, slap, seek, and slide
What is the treatment of keratinocyte skin cancers from least to most side effects?
Topical creams (imiquimod, effudix), curettage and cautery, Mohs surgery, conventional surgery, immunotherapy, radiotherapy, and combined therapies
What is the range of conventional surgery?
LA excision with primary closure (20 mins, straight home) to GA, wide excision including bone, parotidectomy, neck dissection, free flap reconstruction (10 hours and 14 days in hospital)
What are the features of a lesion in melanoma?
Asymmetry, border, uneven colour, diameter >7mm, and evolving
What are the features of a lesion in melanoma?
Change in size of lesion, irregular pigmentation, irregular border, inflammation, itch/altered sensation, larger than other lesions (diameter >7mm), and oozing/crusting of lesion
What is stage 0 of melanoma?
Confined to epidermal region of skin
What is stage I of melanoma?
Localised disease, only in skin and very thin
What is stage II of melanoma?
Localised disease, thicker than stage I
What is stage III of melanoma?
Spread to lymph nodes
What is stage IV of melanoma?
Spread to other organs
What is key for melonocyte skin cancers?
Depth
What is the treatment of melanocyte skin cancer?
Topical creams (imiquimod, effudix), conventional surgery, immunotherapy (cempilimab, vismodegib)