Like psoriasis, parapsoriasis shows up as a patchy rash. Spots are usually pink or red but also can appear brown or yellowish. They can be raised and bumpy with a scaly or wrinkly appearance. You typically get them on your chest, stomach, and back, but they also may appear on your arms and legs.
What is chronic small plaque psoriasis?
What is chronic plaque psoriasis? Chronic plaque psoriasis is the most common presentation of psoriasis. It presents as small to large, well-demarcated, red, scaly and thickened areas of skin. It most likely to affect elbows, knees, and lower back but may arise on any part of the body.
What is large plaque?
Large plaque parapsoriasis are skin lesions that may be included in the modern scheme of cutaneous conditions described as parapsoriasis. These lesions, called plaques, may be irregularly round-shaped to oval and are 10 cm (4 in) or larger in diameter.
Is plaque psoriasis curable?
Psoriasis can’t be cured. You’ll probably go through cycles where the rash looks better and then flares up again. The goal of treatment is fewer and less severe flare-ups. You may get medicine to put on your skin or you may take pills, or your doctor may recommend a combination of those.
Is erythroderma curable?
Although most people with erythrodermic psoriasis do well when taking one or more treatment options, some people can’t be helped. The condition is fatal somewhere around 10% to 65% of the time.
What is the prognosis of parapsoriasis with plaques?
Parapsoriasis with plaques < 5 cm in diameter is usually benign; parapsoriasis with larger plaques transforms into cutaneous T-cell lymphoma in about 10% of patients per decade. Diagnose based on clinical appearance; biopsy and other tests may be necessary to rule out cutaneous T-cell lymphoma.
What is the difference between small-plaque parapsoriasis and large-plaques in psoriasis?
In contrast, the plaques in psoriasis are well-demarcated and pink with thicker silvery scale. Small-plaque parapsoriasis is defined by lesions < 5 cm in diameter, whereas large-plaque parapsoriasis has lesions > 5 cm in diameter. This image shows small-plaque parapsoriasis (lesions 5 cm in diameter), which is benign.
What is the pathophysiology of parapsoriasis?
The initiating cause of parapsoriasis is unknown, but the diseases likely represent different stages in a continuum of lymphoproliferative disorders from chronic dermatitis to frank malignancy of cutaneous T-cell lymphoma (CTCL). Small plaque parapsoriasis likely is a reactive process of predominantly CD4 + T cells.
Is small plaque parapsoriasis an abortive T-cell lymphoma?
Some physicians believe that small plaque parapsoriasis is an abortive T-cell lymphoma; however, no clear distinguishing evidence, such as genetic changes (eg, TP53 mutations) observed in other malignancies, exists to support this contention. [ 9]
