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Types of Arthritis

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Browse the glossary by selecting a letter or by entering an arthritis-related term:

Protein A immunoadsorption therapy (Prosorba)

A treatment for rheumatoid arthritis that involves filtering the blood plasma through a special column to remove antibodies associated with RA.


Hormonelike substances in the body that play a role in pain and inflammation among other body functions. Nonsteroidal anti-inflammatory drugs work by blocking the production of prostaglandins.

Proton pump inhibitors (PPIs)

A type of medication that blocks an enzyme in the wall of the stomach to reduce the production of stomach acids. PPIs are used to prevent and treat problems such as ulcers or gastroesophageal reflux disease (GERD) caused or aggravated by excess stomach acid.


A skin disease characterized by thickened, inflamed patches of skin covered by silver-gray scales. Between 10 percent and 30 percent of people with psoriasis develop an associated arthritis referred to as psoriatic arthritis. A small percentage develop the associated arthritis before the skin disease.

Psoriatic arthritis

A form of arthritis that is accompanied by the skin disease psoriasis.


Purines are part of all human and animal tissue – they are important in the formation of genetic material, such as DNA and RNA. Many foods derived from animals, especially those high in protein, are high in purines. It is generally recommended that people with gout avoid diets rich in purines because purine breaks down into uric acid, which can crystallize in the joints of people with gout and cause pain.

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