What is pityriasis rubra pilaris (PRP)?

Pityriasis rubra pilaris (PRP) is a group of rare skin disorders that cause inflammation and shedding of the skin. Typically, PRP appears first as a small spot somewhere on the body and then spreads elsewhere. It will impact different parts of the body in different ways for unpredictable periods of time. PRP patients and their caregivers quickly learn that every case of PRP is unique.



1.  Pityriasis rubra pilaris (PRP) is the name given to a group of rare skin disorders that present with reddish-orange coloured scaling patches with well-defined borders. They may cover the entire body or just parts of the body such as the elbows and knees, palms and soles. Source: DermNet New Zealand. See: www.dermnetnz.org/topics/pityriasis-rubra-pilaris/

2.  Pityriasis rubra pilaris (PRP) is a chronic papulosquamous disorder of unknown etiology characterized by reddish orange scaly plaques, palmoplantar keratoderma, and keratotic follicular papules. The disease may progress to erythroderma with distinct areas of uninvolved skin, the so-called islands of sparing. Source: Medscape.com. See: http://reference.medscape.com/article/1107742-overview

3.  Pityriasis rubra pilaris (PRP) is a rare skin issue. It causes constant inflammation and shedding of the skin. PRP can affect parts of your body or your entire body. The disorder may start in childhood or adulthood. It affects males and females equally. Source: Healthline.com. See: http://www.healthline.com/health/pityriasis-rubra-pilaris#Introduction1

4.  Pityriasis rubra pilaris (PRP) refers to a group of skin conditions that cause constant inflammation and scaling of the skin. Affected people have reddish-orange colored patches; they may occur everywhere on the body or only on certain areas. There are several types of PRP, which are classified based on age of onset, body areas affected, and whether other associated conditions are present. PRP is usually sporadic (occurring randomly) but some forms may be inherited. Source: Genetic and Rare Disease Information Center, See:  https://rarediseases.info.nih.gov/diseases/7401/pityriasis-rubra-pilaris

5.  Pityriasis rubra pilaris (PRP) is a chronic skin disorder that is possibly caused by an inherited metabolic defect. Initially, the disorder is characterized by elevated spots (papules) on the skin. These spots grow and become connected, producing red plaques over large areas. Source: National Organization of Rare Disorders. See: https://rarediseases.org/rare-diseases/pityriasis-rubra-pilaris/

6.  Pityriasis rubra pilaris (PRP) is a rare condition that is often initially mistaken for another skin disorder, usually psoriasis. PRP is not really a single condition, but rather a group of unusual eruptions that cause red scaly patches containing dry plugged pores. It may cover the entire body, or just the elbows and knees. Source: American Osteopathic College of Dermatology. See: http://www.aocd.org/?page=PityriasisRubraPil

7.  Pityriasis rubra pilaris is a rare skin disorder that causes constant inflammation and scaling (exfoliation) of the skin. Source: MedlinePlus. See: https://medlineplus.gov/ency/article/001471.htm

8.  Pityriasis rubra pilaris (PRP) is a rare chronic disorder that causes hyperkeratotic yellowing of the skin, including the trunk, extremities, and, particularly, the palms and soles. Red follicular papules typically merge to form red-orange scaling plaques and confluent areas of erythema with islands of normal skin between lesions. Source: Merck Manuals: See: http://www.merckmanuals.com/professional/dermatologic-disorders/psoriasis-and-scaling-diseases/pityriasis-rubra-pilaris

9. Pityriasis rubra pilaris is the name given to a group of uncommon skin disorders. The name means scaling (pityriasis), redness (rubra) and involvement of the hair follicles (pilaris). Source: British Association of Dermatolologists. See: http://www.bad.org.uk/shared/get-file.ashx?id=116&itemtype=document

How would you define your version of PRP to a member of your family or a friend, co-worker, employer, teacher of school administrator? What do you want to share?

SG 01.01.00

35 Replies to “What is pityriasis rubra pilaris (PRP)?”

  1. Just found out that the root word of pityriasis is the Greek word for “bran.” I always thought the dried flakes looked like oatmeal or baby cereal.
    Etymology: Gk, pityron, meaning bran
    Mosby’s Medical Dictionary, 9th edition. © 2009, Elsevier.

  2. I don’t think that these definitions give any indication of the intensity of the symptoms. Perhaps this come in a later section?

  3. Pat — I will look for “intensity”. If I don’t find it, I will stick it someplace where it makes sence.

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