Parapsoriasis
Encyclopedia
Parapsoriasis refers to one of a group of skin disorders that are characterized primarily by their resemblance to psoriasis
(red, scaly lesions), rather than by their underlying etiology
.
Neoplasms can develop from parapsoriasis. For example, it can develop into cutaneous T-cell lymphoma.
The word "Parapsoriasis" was formed in 1902.
Psoriasis
Psoriasis is an autoimmune disease that appears on the skin. It occurs when the immune system mistakes the skin cells as a pathogen, and sends out faulty signals that speed up the growth cycle of skin cells. Psoriasis is not contagious. However, psoriasis has been linked to an increased risk of...
(red, scaly lesions), rather than by their underlying etiology
Etiology
Etiology is the study of causation, or origination. The word is derived from the Greek , aitiologia, "giving a reason for" ....
.
Neoplasms can develop from parapsoriasis. For example, it can develop into cutaneous T-cell lymphoma.
The word "Parapsoriasis" was formed in 1902.
Classification
The parapsoriasis group, described and debated for nearly a century, has spawned a confusing nomenclature. There are some authors who prefer to limit the term "parapsoriasis" to large- and small-plaque variants only. However, the following classification scheme is now generally accepted:- Large-plaque parapsoriasisLarge-plaque parapsoriasisLarge 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 or larger in diameter. They can be very thin plaques that are symptomatic or...
- Small-plaque parapsoriasisSmall-plaque parapsoriasisSmall plaque parapsoriasis characteristically occurs with skin lesions that are round, oval, discrete patches or thin plaques, mainly on the trunk....
- Pityriasis lichenoidesPityriasis lichenoidesPityriasis lichenoides is a form of pityriasis.Types include:* Pityriasis lichenoides et varioliformis acuta* Pityriasis lichenoides chronica...
- Pityriasis lichenoides chronicaPityriasis lichenoides chronicaPityriasis lichenoides chronica is an uncommon, idiopathic, acquired dermatosis, characterized by evolving groups of erythematous, scaly papules that may persist for months.- Causes :Pityriasis...
- Pityriasis lichenoides et varioliformis acutaPityriasis lichenoides et varioliformis acutaPityriasis lichenoides et varioliformis acuta is a disease of the immune system. It is the more severe version of Pityriasis lichenoides chronica...
- Pityriasis lichenoides chronica
- Lymphomatoid papulosisLymphomatoid papulosisLymphomatoid papulosis is a rare skin disorder. The overall prevalence rate of lymphomatoid papulosis is estimated at 1.2 to 1.9 cases per 1,000,000 population.This rare condition has only been studied in depth since 1968.-Presentation:...