Papulosquamous Diseases Flashcards Preview

Clin Med I - Dermatology > Papulosquamous Diseases > Flashcards

Flashcards in Papulosquamous Diseases Deck (31)
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1
Q

Where is psoriasis typically located?

A
  • extensor surfaces of elbows & knees

- scalp

2
Q

Describe psoriasis

A
  • chronic, inflammatory condition

- epidermal proliferation that results in thickened stratum corneum

3
Q

When is psoriasis usually diagnosed?

A
  • 3rd decade
4
Q

Describe the signs and symptoms of psoriasis

A
  • well demarcated erythematous plaque with a silvery scale

- raised

5
Q

What is the etiology of psoriasis?

A
  • unknown
6
Q

Describe genetic rate of psoriasis

A
  • 50% of patients with psoriasis also have family hx
7
Q

What is the most common type of psoriasis?

A
  • plaque
8
Q

What can cause guttate psoriasis or worsen and existing psoriasis?

A
  • streptococcal infection
9
Q

What other events can worsen psoriasis?

A
  • emotional stress
  • skin trauma
  • drugs
  • obesity
10
Q

What is Koebner Phenomenon?

A
  • psoriasis presenting where there was skin injury

- i.e. incision or road rash

11
Q

What can happen to psoriasis plaques?

A
  • fissure

- bleed

12
Q

What other symptoms may occur with psoriasis?

A
  • pruritis
  • pain
  • arthralgias (i.e. psoriatic arthritis)
13
Q

How does nail psoriasis present as?

A
  • subungal discoloration, often yellow/white
14
Q

nail psoriasis ddx

A
  • onychomycosis (nail fungus)
15
Q

What are the systemic effects of psoriasis?

A
  • psoriatic arthritis
  • inflammation
  • depression
16
Q

Describe psoriatic arthritis

A
  • same inflammatory process affects the joints

- 30% or patients

17
Q

What is the treatment for psoriasis?

A
  • no cure, only topical steroids

others: calcipotriene, tazarotene, taclonex, tar

18
Q

What is a non-drug treatment for psoriasis?

A
  • phototherapy
19
Q

What are the systemic treatment options for psoriasis?

A
  • methotrexate
  • soriatane
  • cyclosporine
  • biologics
20
Q

Describe the clinical features of PR

A
  • herald patch

- intensely pruritic

21
Q

Describe the herald patch, what disease is it found with

A
  • one large 2-6 cm patch
  • round/oval, pink/tan, scaly
  • presents 3-7d prior to remainder of sx
22
Q

What does the distribution look like for pityriasis rosea?

A
  • christmas tree
23
Q

What is the treatment for pityriasis rosea?

A
  • time, resolves on its own

- alleviating pruritis via topical steroids, oral antihistamines, or phototherapy

24
Q

Describe the clinical presentation of lichen planus

A
  • pruritic flat topped violacsous (purple) papules
  • fine white streaks or grey lines within lesions
  • oral erosions or lacy white patches on buccal mucosa
  • scarring alopecia
  • nail deformity
25
Q

What are wickham’s striae?

A
  • fine white streaks or grey lines within the lichen planus lesions
26
Q

lichen planus ddx?

A
  • drug reactions
27
Q

What is the treatment for lichen planus?

A
  • topical steroids
  • systemic steroids (prednisone) for severe cases
  • phototherapy
  • plaquenil
28
Q

Which of the treatments for lichen planus is an anitmalarial antiinflammatory?

A
  • plaquenil
29
Q

When will lichen planus resolve?

A
  • spontaneously 6m - 2y
30
Q

What can cause flares of lichen planus?

A
  • stress
31
Q

The 4 ps of LP

A

Pruritic purple polygonal papules