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Derm slides Presentation Transcript

  • 1. Macule: flat circumscribed area that is a change in thecolor of skin, less than 1 cm in diameterExample: freckles, flat moles, petechiae, measles, scarletfever
  • 2. • Papule: an elevated, firm, circumscribed area; less than 1 cm in diameter• Examples: wart, elevated moles, lichen planus
  • 3. • Wheal: elevated, irregular-shaped area of cutaneous edema; solid, transient, variable diameter• Examples: insect bites, urticaria, allergic reaction
  • 4. • Nodule: elevated, firm circumscribed lesion; deeper in dermis than a papule; 1-2 cm in diameter• Examples: erythema nodosum, lipoma
  • 5. • Pustule: elevated, superficial lesion; similar to a vesicle but filled with purulent fluid• Examples: impetigo, acne
  • 6. • Telangiectasia: fine, irregular, red lines produced by capillary dilation• Examples: telangiectasia in rosacea
  • 7. • Scale: heaped-up, keratinized cells; flaky skin; irregular; thick or thin; dry or oily; variation in size• Example: flaking of skin with seborrhic dermatitis following scarlet fever or flaking of skin following a drug reaction; dry skin
  • 8. • Scar: thin to thick fibrous tissue that replaces normal skin following injury or laceration to the dermis• Example: healed wound or surgical incision
  • 9. • Fissure: linear crack or break from the epidermis to the dermis; may be moist or dry• Examples: Athlete’s foot, cracks at the corner of the mouth
  • 10. • Erosion: Loss of part of the epidermis; depressed, moist, glistening; follows rupture of a vesicle or bulla• Examples: varicella, variola after rupture
  • 11. • Keloid: irregular-shaped, elevated, progressively enlarging scar; grows beyond the boundaries of the wound; caused by excessive collagen formation during healing• Examples: keloid formation following surgery
  • 12. • Bulla: vesicle greater than 1 cm in diameter• Examples: blister, pemphigus vulgaris
  • 13. • Vesicle: elevated, circumscribed, superficial, not into dermis, filled with serous fluid; less than 1 cm in diameter• Examples: varicella (chickenpox), herpes zoster (shingles)
  • 14. • Cyst: elevated, circumscribed, encapsulated lesion,; in dermis or subcutaneous layer; filled with liquid or semisolid material• Examples: sabaceous cyst, cystic acne
  • 15. • Plaque: elevated, firm, and rough lesion with flat top surface greater than 1 cm in diameter• Examples: psoriasis, seborrheic, and actinic keratoses
  • 16. • Crust: dried serum, blood, or purulent exudates; slightly elevated; size varies; brown, red, black, tan, or straw-colored• Examples: scab or abrasion, eczema
  • 17. • Lichenification: rough, thickened epidermis secondary to persistent rubbing, itching or skin irritation; often involves flexor surface or extremity• Examples: chronic dermatitis
  • 18. • Ulcer: loss of epidermis and dermis; concave; varies in size• Examples: decubiti, statis ulcer
  • 19. • Tumor: elevated and solid lesion; may or may not be clearly demarcated; deeper in dermis; greater than 2 cm in diameter• Examples: neoplasms, benign tumor. lipoma
  • 20. • Excoriation: loss of the epidermis; linear hollowed-out, crusted area• Examples: abrasion or scratch, scabies
  • 21. • Atrophy: thinning of skin surface and loss of skin markings; skin translucent and paper-like• Examples: striae; aged skin
  • 22. • Patch: a flat, nonpalpable, irregular-shaped macule greater than 1 cm in diameter• Examples: vitiligo, port-wine stains, Mongolian spots, cafe au lait patch