Pityriasis lichenoides
Pityriasis Lichenoides
Pityriasis lichenoides (pronunciation: pit-uh-rye-uh-sis lichenoides) is a rare skin disorder that is characterized by the appearance of small, asymptomatic, scaling papules on the skin.
Etymology
The term "pityriasis" is derived from the Greek word "pityron", which means bran, referring to the characteristic skin scaling associated with the condition. "Lichenoides" is derived from the Greek word "lichen", which means tree moss, and the suffix "-oides", which means resembling, referring to the resemblance of the skin lesions to lichen.
Types
There are two types of pityriasis lichenoides:
- Pityriasis Lichenoides Chronica (PLC): This is the milder form of the disease, characterized by the slow development of symptomless, small, scaling papules that can last for several months.
- Pityriasis Lichenoides et Varioliformis Acuta (PLEVA): This is the more severe form of the disease, characterized by the sudden onset of symptomatic, scaling papules that can evolve into necrotic ulcers.
Symptoms
The main symptom of pityriasis lichenoides is the appearance of small, scaling papules on the skin. These papules are usually red or brown in color and can appear anywhere on the body, but they are most commonly found on the trunk, arms, and legs. In some cases, the papules may be itchy or painful.
Causes
The exact cause of pityriasis lichenoides is unknown. However, it is believed to be an abnormal immune response to a variety of triggers, including infections, medications, and vaccinations.
Treatment
Treatment for pityriasis lichenoides may include topical corticosteroids, light therapy, and oral medications. In severe cases, immunosuppressive drugs may be used.
Related Terms
- Dermatology: The branch of medicine dealing with the skin and its diseases.
- Papule: A small, raised, solid pimple or swelling on the skin.
- Corticosteroids: A class of drugs used to reduce inflammation in the body.
External links
- Medical encyclopedia article on Pityriasis lichenoides
- Wikipedia's article - Pityriasis lichenoides
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