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Chapter 14

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  • scabies
    a skin infection caused by a mite called Sarcoptes scabiei.
  • constrict
    to narrow.
  • acute
    as related to illness, short-term and requiring immediate care.
  • shingles
    a skin rash caused by the varicella-zoster virus (VZV) that causes pain, tingling, itching, and a rash of blood-filled blisters.
  • squamous cell carcinoma (SCC)
    a form of skin cancer occurring in the squamous cells on the outer surface of the epidermis; less common but more likely to spread than basal cell carcinoma.
  • ecchymosis
    a large, flat, purple to bluish bruise on the skin; caused by trauma or a bleeding disorder.
  • etiology
    the origin, or cause, of a disease or condition.
  • dermatoscope
    a circular lens that magnifies skin lesions for closer inspection.
  • pustule
    a raised area on the skin filled with a yellowish-white fluid called pus.
  • bulla
    a raised area on the skin larger than 1 centimeter that is filled with clear fluid.
  • cancer
    a general term to describe a disease in which abnormal cells grow in an uncontrolled way.
  • macule
    a flat area on the skin that is different in color from the rest of the skin.
  • Wood’s light
    a lamp used in a darkened room to illuminate skin abnormalities using ultraviolet (UV) light.
  • malaise
    a general sense of feeling unwell.
  • wheal
    a reddened area on the skin that may or may not be raised; indication of an allergic reaction; also called a hive.
  • basal cell carcinoma (BCC)
    the most common form of skin cancer, affecting the basal cells of the epidermis; usually appears in areas that have been exposed to the sun.
  • malignant melanoma
    the most dangerous type of skin cancer, appearing in the melanocytes (cells that produce melanin); can spread quickly to surrounding tissues and organs.
  • dilate
    to widen.
  • excoriation
    in health care, a scratch on the skin.
  • erosion
    in health care, an open area in the skin where the top layer of the epidermis has been removed due to friction or pressure.
  • rosacea
    a skin condition caused by the dilation of capillaries on the face; causes facial redness and f lushing.
  • Methicillin-resistant Staphylococcus aureus (MRSA)
    bacteria (Staphylococcus aureus) that have developed resistance to the antibiotic methicillin.
  • papule
    a small, solid raised area on the skin with a diameter smaller than 0.5 centimeters.
  • dermatologist
    a physician who diagnoses and treats conditions of the integumentary system.
  • purpura
    a reddish-purple lesion on the skin.
  • petechiae
    pin-sized red spots on the skin
  • metastasize
    to spread from one part of the body to another.
  • vesicle
    a raised area on the skin smaller than 1 centimeter and filled with clear fluid.
  • fungus
    a type of living organism that can sometimes cause infection; Candida is a common example.
  • inflammation
    redness/discoloration and swelling.
  • nodule
    a large, solid raised area on the skin larger than 1 centimeter.
  • protein
    a nutrient essential for tissue growth and repair; also supplies energy for the body.
  • fat
    a type of nutrient that helps the body store energy; fats also add flavor to food and are important for the absorption of certain vitamins.
  • wound
    a type of injury to the skin.
  • varicose veins
    enlarged veins that cause blood to pool in the legs.
  • ulcer
    as relates to the integumentary system, a wound in the skin that extends into the dermis.
  • autoimmune condition
    a condition in which the body’s immune system attacks normal tissue in the body.
  • pediculosis
    an infestation of lice.
  • dermatitis
    a general term that refers to an inflammation, or redness/discoloration and swelling, of the skin.
  • impetigo
    a mild skin infection caused by either streptococci or staphylococci.
  • keloid
    an abnormal growth that forms over scar tissue after an injury.
  • self-limiting
    in medicine, capable of healing without treatment.
  • acne vulgaris
    skin condition caused by inflammation of the sebaceous glands and skin follicles; can result in pimples, blackheads, and whiteheads.
  • plaque
    a flat skin lesion with a scaly appearance.
  • crust
    an accumulation of dried blood and fluid that forms over an injury to the skin; commonly called a scab.
  • excise
    to surgically remove.
  • cellulitis
    a bacterial infection affecting the skin and soft tissue.
  • scale
    a skin lesion caused by the accumulation of extra epithelial (skin) cells on the epidermis; silver to white in color.
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