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28 Cards in this Set

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What are the most common scaling rashes in adults?
1. psoriasis
2. eczema
3. seborrheic dermatitis
4. pityriasis rosea
5. tinea infection
How can I tell the different causes of scaling rashes apart? (psoriasis vs. eczema etc..)
Look at the pattern of body sites, appearance of the border and scale.
What do the plaques of psoriasis look like?
They are well-circumscribed, raised, salmon-colored plaques with adherent silvery scales.
Eczema often occur in what type of individuals?
Eczema often occurs in "atopic" individuals who are prone to allergies and asthma.
Is eczema itchy?
Yes, it is often pruritic.
What do eczema rashes look like?
They are often symmetrical, erythematous and may contain small vesicles or pustules
If eczema is long-standing, what can occur?
Scaling and thickening (lichenification) can occur.
Is seborrhea itchy?
No, seborrhea is nonpruritic.
What does seborrhea look like?
It has indistinct margins with fine, greasy, yellowish scales and mild erythema.
What does pityriasis rosea look like?
It is a self-limited rash with distinct, oval-shaped, hyperpigmented lesion, each with an inner scaling ring.
How is pityriasis rosea distributed?
The lesions are distributed in an evergreen tree pattern over the trunk.
What are the classic sites involved in psoriasis?
1. scalp
2. extensor surfaces (elbows and knees)
3. umbilicus
4. penis
5. gluteal fold.
What are the classic sites involved in eczema?
1. neck/chest
2. flexor surfaces
3. hands/feet
What are the classic sites involved in pityriasis rosea?
Evergreen pattern on trunk, symmetric lesions
What are the classic sites involved in seborrheic dermatitis?
1. scalp
2. eyebrows
3. nasolabial folds
4. sternum
*the lesions are symmetric
Where is tinea capitis located?
the scalp
Where is tinea corporis located?
the body
What is tinea versicolor located?
the body
Where is tinea crura located?
the groin
Where is tinea pedis located?
the feet
What do you do to diagnose tinea conditions?
Do a KOH prep of skin scrapings and look for hyphae.
What are some further prevention measures for eczema?
1. avoid skin irritants such as wool, newspaper ink, citrus peels, strong soaps, household chemicals
2. minimize scratching with antihistamines
3. keep fingernails short
4. prevent skin dryness with nonlanolin moisturzers and decreased bathing
5. avoid hot water
If eczema is secondarily infected with bacteria (e.g. impetigo), what do you do?
treat with antibiotics
How do you treat psoriasis?
1. coal tar lotion or shampoo
2. topical steroids (high to very-high potency)
3. sun exposure, UV light
4. UV light
5. methotrexate
How do you treat eczema?
1. topical steroids
2. moisturizer
3. irritant avoidance
How do you treat tinea?
antifungal cream
How do you treat seborrheic dermatitis?
1. selenium sulfide shampoo
2. steroid lotion (scalp)
3. ketoconazole shampoo
How do you treat pityriasis rosea
resolves without treatment after 2-8 weeks; antihistamines decrease itching