Atopic

1
Atopic Contact Dermatitis Scaly Dermatoses

• Spring Term 2006
• Lab Week 3

2
Dry Skin

• Most common cause of pruritis
• Windy, cold, arid environment
• SS roughness, scaling, loss of flexibility,
  fissures, inflammation, pruritis, platelike
  scaling, cracked appearance
• Location mostly arms and legs
• Risk of secondary infection
• Tx modify bathing, use emollients, humectants,
  keratin softeners, HC, antipruritics

3
Atopic Dermatitis

• Acute, subacute, or chronic
• Atopic triad asthma, allergic rhinitis, AD
• Exacerbating factors
• Family history
• lt 1 year of age redness, chapping on cheeks
• Primary symptoms intense pruritis, papules and
  vesicles
• Symmetric lesions, flexor surfaces
• Scratching, lichenification ? excoriation
• See PCP if signs of bacterial/viral infection ?
  pustules, vesicles, crusting
• Tx avoid triggers, use emollients, HC,
  astringents, antipruritics

4
Atopic Dermatitis
5
Scaly Dermatoses Dandruff

• Chronic, non-inflammatory, diffuse
• Scalp condition
• Fine, excessive scaling
• Pruritis is common
• Pityrosporum ovale
• Tx use cytostatic and keratolytic agents,
  ketoconazole

6
Scaly Dermatoses Seborrhea

• Subacute or chronic, inflammatory
• Location scalp, face, trunk, hairy areas
• SS erythematous, scaly, pruritic rash or dull,
  yellowish, red lesions well demarcated, oily
  exudation, thick crusting
• Patches or plaques
• Improves in warmer seasons, exacerbated in cold
  months
• Tx Use HC, cytostatic and keratolytic agents,
  ketoconazole

7
Scaly Dermatoses Seborrhea
8
Scaly Dermatoses Psoriasis

• Noncontagious, chronic, inflammatory
• Type I II plaque, inverse, guttate
• Triggers (p.834)
• SS Symmetrical, well circumscribed, sharply
  demarcated, light pink to bright red or maroon,
  overlaying plaque, thick white scales (pulled off
  in layers), pruritis Auspitz signs
• Lesions start as small papules, grow and unite to
  form plaque
• Locations extensor surface of elbows, knees,
  lumbar region, scalp, posterior auricular area.
  Nail and joint involvement
• Tx Use emollients, HC, cytostatic and
  keratolytic agents

9
Scaly Dermatoses Psoriasis
10
Scaly Dermatoses Psoriasis
11
Contact Dermatitis Irritant

• Exposure to harsh chemicals, solvents
• SS Rash inflamed, swollen, red, developing
  vesicles or papules may ooze ? ulcer formation,
  localized necrotic areas
• Itching, stinging, burning
• Locations face, dorsal surface of hands and arms
• Tx Use astringents, HC, antipruritics/anesthetics
  

12
Contact Dermatitis Allergic

• Allergen exposure. Most common poison
  oak/ivy/sumac
• Metal or cosmetic allergy
• 24-48 hours to develop (Type IV hypersensitivity
  reaction)
• SS depends on allergen, site, duration of
  exposure typically red, swollen w/ blisters
  itching, burning, pain
• Tx Use astringents, HC, antipruritics/anesthetics

13
Contact Dermatitis Allergic
14
Contact Dermatitis Allergic