What causes pityriasis Lichenoides?

What causes pityriasis Lichenoides?

The exact cause of pityriasis lichenoides (PL) remains unknown. Theories on the cause have included the possibility of a low-grade or self-limited lymphoproliferative disorder; a hypersensitive reaction to a bacterial or viral infection; and an inappropriate, inflammatory immune response to an unknown foreign agent.

How long does pityriasis Lichenoides Chronica take to heal?

Spots associated with PLC typically fade within 3 to 4 weeks, but new spots may then appear. There is no clear consensus regarding how long either form of PL lasts, but most cases resolve on their own within one to several months.

Is Pityriasis Lichenoides an autoimmune disease?

Pityriasis lichenoides et varioliformis acuta is a disease of the immune system. It is the more severe version of pityriasis lichenoides chronica. The disease is characterized by rashes and small lesions on the skin.

What is PLC PLEVA?

Pityriasis lichenoides is the name given to an uncommon rash of unknown cause. Its chronic (longer-lasting) form is known as pityriasis lichenoides chronica ( PLC ). The more acute (sudden onset) form is known as pityriasis lichenoides et varioliformis acuta ( PLEVA ), also known as Mucha-Habermann disease .

Is there a cure for PLC?

In some cases, pityriasis lichenoides chronica (PLC) may fade over time without requiring any treatment. In other cases, people with PLC may want treatment because there are many papules that are taking a long time to fade.

Is lichen Striatus curable?

Lichen striatus will go away on its own without treatment. This usually takes several months to a year. As the rash goes away, the bumps fade and may leave behind a lighter area of skin. This is not permanent.

Is PLC skin disease curable?

Is Pityriasis Lichenoides Chronica rare?

Pityriasis lichenoides is a rare skin disorder of unknown cause. There are two types of pityriasis lichenoides: an acute form usually found in children known as pityriasis lichenoides et varioliformis acuta (PLEVA), and a more long-lasting form known as pityriasis lichenoides chronica (PLC).

What does PLEVA look like?

PLEVA starts as an acute eruption of bright red, flat to slightly raised, 2-10 mm oval spots. The lesions then evolve, developing small blisters and pustules, and eventually ulcerate and crust over. The lesions can appear singly or in groups, and can coalesce into large areas of rash.

How long does it take for Pityriasis Alba to go away?

The duration of pityriasis alba varies from 1 month to 10 years, with most cases resolving over a period of several months to a year. Diagnosis is made clinically, and treatment consists of skin care and education of a young patient’s parents about the benign nature of the disorder.

Is lichen striatus itchy?

Sometimes it can be itchy. This is most common on the arms and legs, but can also appear on the face, neck, trunk or buttocks. This rash is common in school-aged children.

What is plc disease?

Pityriasis lichenoides chronica (PLC) is probably caused by a hypersensitivity reaction to infectious agents such as the Epstein–Barr virus. Other infectious agents include the adenovirus and Parvovirus B19 .

When does Pityriasis lichenoides chronica ( PLC ) start?

Pityriasis lichenoides chronica (PLC) is an uncommon, idiopathic, acquired dermatosis, characterized by evolving groups of erythematous, scaly papules that may persist for months. Although other forms of the disease occur at younger ages, some individuals start having long term symptoms at thirty years of age.

What kind of rash does Pityriasis lichenoides cause?

Pityriasis lichenoides is an uncommon rash of unknown cause. It can range from a relatively mild chronic form to a more severe acute eruption. The mild chronic form, pityriasis lichenoides chronica (PLC), is characterised by the gradual development of symptomless, small, scaling papules that spontaneously flatten and regress over weeks.

How long does it take for a PLC spot to go away?

PLC tends to have small, round, dusky pink, scaly lesions. The scaling spots flatten out over several weeks, leaving brown discoloration, which fades slowly over several months.