Plaque psoriasis
Plaque Psoriasis
Plaque psoriasis (pronounced: plak sə-ˈrī-ə-səs), also known as psoriasis vulgaris, is the most common form of psoriasis, a chronic autoimmune skin disease.
Etymology
The term "psoriasis" originates from the Greek word "psora" which means "itch". "Plaque" refers to the characteristic patches of raised, reddish skin covered with silvery-white scale that are typical of this condition.
Definition
Plaque psoriasis is characterized by patches of abnormal skin, known as plaques, which are typically red, itchy, and scaly. These plaques may appear anywhere on the body but are most commonly found on the elbows, knees, scalp, and lower back.
Symptoms
Symptoms of plaque psoriasis include:
- Red, raised, inflamed patches of skin
- Whitish-silver scales or plaques on the red patches
- Dry skin that may crack and bleed
- Soreness around patches
- Itching and burning sensations around patches
- Thick, pitted nails
- Painful, swollen joints
Causes
The exact cause of plaque psoriasis is unknown, but it is believed to involve a combination of genetic and environmental factors. It is also associated with an overactive immune system, specifically involving T cells and neutrophils in the body.
Treatment
Treatment for plaque psoriasis typically involves a combination of topical treatments, systemic medications, and light therapy. Common treatments include corticosteroids, vitamin D analogues, retinoids, and biologics.
Related Terms
- Psoriasis: A chronic autoimmune skin disease that speeds up the growth cycle of skin cells.
- Guttate psoriasis: A type of psoriasis that appears as small, dot-like lesions.
- Inverse psoriasis: A type of psoriasis that causes smooth patches of red, inflamed skin.
- Pustular psoriasis: A rare form of psoriasis that causes pus-filled blisters.
- Erythrodermic psoriasis: A severe and very rare type of psoriasis.
External links
- Medical encyclopedia article on Plaque psoriasis
- Wikipedia's article - Plaque psoriasis
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