A prototypical papulosquamous condition. Well-demarcated erythematous papules and plaques with silvery scale. Usually on extensor surfaces.
This is a multifactorial disease in patients who are genetically predisposed.
30% of patients have a family history.
Demonstrates "Auspitz's Sign"
When the individual silvery scales are plucked from the psoriatic plaques, tiny pinpoint capillary bleeding may be seen, which is the sign.
Numerous small papular lesions with silvery scaling evolve suddenly over the body.
This occurs 1-3 weeks after streptococcal pharyngitis.
Generalized erythema and scale covering the entire body may occur secondary to...
- Over vigorous therapy
- A superimposed drug reaction
- Withdrawal from oral corticosteroids
Plaques evolve in intertriginous areas. Basically, psoriasis that develops only in areas that are moist and wet. These areas are usually unaffected in regular psoriasis.
The typical silver scale is absent because of the moisture.
Psoriasis Topical Treatment
Patients are counseled to avoid irritants and use a moisturizer. This is extremely important; if this is not done, any other treatment won't work.
- Topical corticosteroids
- Topical calcineurin inhibitors
- Photo therapy
Psoriasis Systemic Treatment
Occur in 50% of cases and can be a clue to the diagnosis.
Nail pits look like "pick-like" depressions
Is a usually benign skin rash. Classically, it begins with a single "herald rash" lesion, which is followed in 1 or 2 weeks by a generalized body rash.
Often preceded by an upper respiratory infection.
Spontaneously resolves in 1-2 months.
Characterized by flat topped polygonal, purple papules.
Typical locations are ankles, wrists, mouth, genitalia.
Presents with red or copper-coloured scaling papules and plaques that are sometimes annular and are usually generalized and often include the palms and soles.