Integumentary System Ch. 5 Part 3

Skin Disorders Cancer Burns

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

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

Melanoma Benign – not cancerous Malignant - cancerous

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

Basal Cell Carcinoma

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

Squamous Cell Carcinoma

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

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

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

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

Burns