Plaque psoriasis |
Well circumscribed, erythematous, scaly plaques > 0.5 cm in diameter, either as single lesions or as generalized disease Classified further according to anatomic sites
|
• Flexural |
Also known as intertriginous or inverse psoriasis Well circumscribed, minimally scaly, thin plaques localized to the skin folds (inframammary, axillary, groin, genital, natal cleft regions)
|
• Nail |
Can present without concomitant skin plaques Pitting, distal onycholysis, subungual hyperkeratosis, oil drop sign, splinter hemorrhages, leukonychia, crumbling, red lunula Nail involvement is a predictor of psoriatic arthritis
|
• Scalp |
|
• Palmoplantar |
|
Other variants | |
• Guttate |
Acute eruption of “dew-drop,” salmon-pink, fine-scaled, small papules on the trunk or limbs Can follow history of group A streptococcal pharyngitis or perianal group A streptococcus dermatitis
|
• Pustular |
Sheets of monomorphic pustules on painful, inflamed skin Most commonly localized to the palms or soles
|
• Erythroderma |
Acute or subacute onset of generalized erythema covering 90% or more of the patient’s entire body with little scaling Might be associated with hypothermia, hypoalbuminemia, electrolyte imbalances, and high-output cardiac failure Life-threatening emergency
|
• Annular |
|