Term
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Definition
1) genetic predisposition when exposed to certain environmental factors
2) exposure to UV radiation |
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Term
What are the 3 main types of skin cancer?
what is the prognosis of each? |
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Definition
1) basal cell carcinoma- most common, least harmful
2) squamous cell carcinoma- can become fatal
3) malignant melanoma- least common, usually fatal unless treated early |
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Term
What happens in basal cell carcinoma?
where does it start?
treatment? |
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Definition
-begins in stratum basale
-causes tissue destruction producing open ulcer
-treated by surgery or radiation therapy |
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Term
What happens in squamous cell carcinoma?
where does it begin?
what happens on rare occasions? |
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Definition
-begins in stratum spinosum, cells continue unregulated cell growth (shouldn't have dividing ability)
-rarely, tumor can migrate out of epidermis & invade dermis
-tumor can metastasize & travel to other body locations via circulatory system |
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Term
What happens in malignant melanoma?
how developed? |
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Definition
-develops from melanocytes usually in a pre-existing mole
-develops a large flat pigmented nodule "hard lump"
-metastasis is common |
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Term
| What does metastasis mean? |
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Definition
| a cancer tumor "breaking free" and traveling to other body locations via circulatory system |
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Term
What are first degree burns?
involve what structure?
healing time? |
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Definition
-involve only epidermis
-red, painful, but heal in < 1 week
-do not scar |
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Term
What are second degree burns?
involve what structure?
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Definition
-involve epidermis and dermis
-red, painful, heal in in 1-2 weeks
-scarring depends on how badly dermis is damaged
-edema usually develops
-blisters |
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Term
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Definition
the loss of fluid from blood vessels & into tissues
-inflammation & swelling
-usually occurs in 2nd degree burns |
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Term
| What are 3rd degree burns? |
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Definition
-epidermis & dermis are completely destroyed
-skin grafts are often necessary b/c skin can regenerate only from edges of burns |
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