Flashcards in Chapter 24: Med Surg Deck (69)
responsible for tanning, elastic tissue damage and actinic skin damage
responsible for sunburn, major developer of skin cancer
skin's response to injury and increased melanin
light creams and lotions designed to absorb or filter UV light, resulting in diminished UV light penetration
thick and opaque heavy creams that reflect UV radiation
blocks UVB rays
block both UVB and UVA
what was treated with radiation 30 years ago?
acne and hirtuism causing increased carcinoma in present middle aged patients
essential for epithelial cell structure and normal wound healing
essential for complex metabolic functions; deficiencies can cause erythema
essential for connective tissue and normal wound healing; absence can cause scurvy or petechiae
essential for bones
Unsaturated fatty acids
essential for cellular and subcellular membranes in tissue metabolism
water-soluble B complex prevents rashes and alopecia; e.g. liver, cauliflower, salmon, carrots, bananas
velvety dark skin of neck and body folds
cornerstone rule of self-skin examination; asymmetry, border, color, diameter >6 mm, and evolution
risk factors for developing skin cancer
fair skin (blonde or red hair and green or blue eyes), chronic sun exposure, family history, chemicals
do not develop from melanocytes, instead develop in epidermis on sun exposed areas (face, head, neck, back of hands, and arms)
flat or elevated hyperkeratotic papules and plaques on sun exposed portions of body; greatly effect the elderly, most common of all precancerous lesions
basal cell carcinoma
well defined, locally invasive, epidermal basal cells, most common and least deadly and almost never spread beyond skin; some mistaken for melanoma because of curled borders and opaque appearance
squamous cell carcinoma
keratinizing cells, sun exposed or previously damaged skin, scaly appearance, less common but more aggressive, has potential to metastasize, biopsy should ALWAYS be performed when suspected
most deadly skin cancer and can metastasize to any organ
where does malignant melanoma frequently occur for women?
lower legs and back
where does malignant melanoma frequently occur for men?
trunk, head, and neck
when melanoma begins in the skin
all suspected melanoma should be biopsied how?
what is the most important prognostic factor?
tumor thickness at time of diagnosis
depth of tumor in millimeters