1. Integumentary System Ch. 5 Part 3

2. Skin Disorders Cancer Burns

3. Skin Cancers Over 1 million diagnosed each year Arizonan’s have 3-7x more risk than people in other states 3 common types – Melanoma – Basal cell carcinoma – Squamous cell carcinoma

4. Melanoma Most dangerous form of skin cancer Appears as: – Change in existing mole – Small, dark multicolored spot with irregular borders, elevated or flat, bleed or form scab – Cluster of shiny, firm, dark bumps – Larger than a pencil eraser

5. Melanoma Benign – not cancerous Malignant - cancerous

6. Basal Cell Carcinoma Come from cells in stratum basale of epidermis Appear on sun-exposed skin as: – Pearly or flesh-colored oval bump with a rolled border, may develop into bleeding ulcer – Smooth red spot indented in center – Reddish, brown, or bluish black patch of skin on the chest or back

7. Basal Cell Carcinoma

8. Squamous Cell Carcinoma Arise from squamous cells of epidermis Arise from damaged tissue Appear on sun-exposed skin as: – A firm, reddish, wart-like bump that grows gradually – Flat spot that becomes a bleeding sore and won’t heal

9. Squamous Cell Carcinoma

10. Symptoms Any change in size, color, shape or texture of a mole or other skin growth Open or inflamed skin wound that won’t heal ABCD’S of melanoma – A – asymmetry – B – border – C – color – D – diameter

11. Burns 1 st, 2 nd, 3 rd degree Named according to severity 1 st degree – Least severe – Redness or discoloration – Swelling and pain – Usually overexposure to sun – Only epidermis is damaged

12. Burns 2 nd degree – Affect epidermis and dermis – May blister – Scarring may result – Most painful because nerves are intact but tissue is damaged – May involve loss of skin function

13. Burns 3 rd degree – Worst burn – May look white or charred – Extend through all skin layers – epidermis, dermis, subcutaneous layer – Severe to no pain depending on nerve damage – Requires skin grafts

14. Burns