Derm1- Skin Lesions 1

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  1. Describe a primary lesion.
    initial eruption that develops spontaneously as a direct reflection of the underlying disease
  2. Describe a secondary lesion.
    evolve from primary lesion, induced by patient (such as, ulcer that develops from a pustule that ruptured)
  3. What is the ideal lesion to sample for diagnostics?
    the primary lesion
  4. Give examples of some primary lesions. (7)
    macule/patch, papule/plaque, pustule, vesicle/bulla, wheal/angioedema, nodule/mass, cyst
  5. Give examples of some lesions that are primary or secondary. (5)
    alopecia, scale, crust, follicular cast, comedo
  6. Give examples of some secondary lesions. (7)
    excoriation, epidermal collarette, erosion/ulcer, scar, fissure, lichenification, callus
  7. Circumscribed non-palpable spot (not raised); often hyper-pigmented or depigmented.
    macule (≤1cm)/patch (>1cm)
  8. What is the difference b/w erythema and hemorrhage?
    erythema- dilated blood vessels; hemorrhage- vessels leak blood
  9. How do you distinguish b/w areas of hemorrhage and areas of erythema?
    diascopy- taking a glass slide, pressing it on the surface of the lesion...if it blanches, it is erythema; if it does not blanch, it is hemorrhage
  10. Small palpable solid elevation of the skin.
    papule (≤1cm)/ plaque (>1cm- flat topped!)
  11. What can cause papules to form?
    epidermal hyperplasia or dermal edema/cells
  12. Usually papules are associated with ____________.
  13. Plaques may be formed by...
    extension or coalition of papules
  14. Small circumscribed elevation of the epidermis that is filled with pus.
  15. What are the 2 types of pustules?
    follicular or interfollicular
  16. Sharply demarcated elevation of the epidermis filled with clear fluid or blood.
    vesicle (≤1cm)/ bulla (>1cm)
  17. Sharply circumscribed, raised lesion consisting of edema that usually disappears within minutes/hours.
  18. Sharply circumscribed, raised lesion consisting of edema that involves deep dermis and subcutis.
  19. What results of diascopy will you get with wheals/angioedemas?
    will blanch
  20. What causes wheals and angioedemas?
    type I hypersensitivity reaction- IgE [hives]
  21. Circumscribed solid elevation that is >1cm and extends into the dermis and subQ and may drain.
    nodule (smaller)/ mass (larger)
  22. What do you evaluate with a nodule or mass?
    • neoplastic or non-neoplastic?
    • if non-neoplastic--> infectious or non-infectious?
    • if neoplastic--> benign or malignant?
  23. Smooth, round, circumscribed, fluctuant to solid mass with a hollow lumen containing fluid to semi-solid material; lined by epithelium.
  24. What are the 2 types of cysts?
    follicular or glandular
  25. An accumulation of loose fragments of the cornified layer of the skin.
    scale- "dandruff"
  26. Formed when dried exudate, serum, pus, blood, cells, scales, or medication adhere to the skin surface.
  27. Accumulation of keratin and follicular material that adheres to the hair shaft, extending above the surface of the follicular ostia.
    follicular cast
  28. What are 2 other names for follicular casts?
    candle wax, follicular fronding
  29. Dilated hair follicle filled with cornified cells and sebaceous material.
    comedo- "blackhead"
  30. Erosions or ulcers caused by scratching, biting, rubbing; self-produced, often by pruritus.
  31. Special type of scale arranged in a circular rim of loose keratin flakes or peeling keratin.
    epidermal collarette
  32. Shallow epidermal defect that does not penetrate the basement membrane, and therefore, heals without scarring.
  33. Defect that penetrates the basement membrane, exposing the dermis, and therefore, heals to form a scar.
  34. Area of fibrous tissue that has replaced damages dermis or subQ; skin is contracted; depressed lesion, non-pigmented.
  35. Linear cleavage into the epidermis, or through the epidermis, into the dermis due to disease or injury.
  36. Thickening and hardening of the skin characterized by an exaggeration of the superficial skin markings; may be hyperpigmented, but never hypopigmented.
  37. What are causes of lichenification? (3)
    friction, trauma, pruritus
  38. Localized, hyperplastic skin reaction that is secondary to trauma, pressure, or friction.
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Card Set:
Derm1- Skin Lesions 1
2016-01-21 00:52:53
vetmed derm1

vetmed derm1
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