Dermatology Glossary R

A - B - C - D - E - F - G - H - I - J - K - L - M - N - O - PQ - R - S - T - UV - WXYZ

Radiesse
This is the brand name of a dermal filler  made of synthetic microspheres of calcium hydroxyapetite, which is the durable material found in teeth. Once the spheres are injected into the skin, the body slowly produces collagen around them. This dermal filler, which lasts a year or longer, is especially helpful for the treatment of nasolabial and melolabial folds and for filling hollow cheeks.

Red facial blood vessels
These are fine read veins that are visible along the sides of the nose and cheeks. They tend to worsen with age, especially in fair-skinned individuals, and in those who smoke, consume alcohol regularly, and expose their skin to excessive sun and heat. These vessels can be treated with a series of pulsed dye laser or KTP laser sessions or with intense pulsed light (IPL).

Retinoid

Retinoid DiagramRetinoids are a class of medication derived from vitamin A that are used to treat a variety of skin conditions. Retinoids may be taken orally or applied onto the skin. Isotretinoin (Accutane, Sotret) is an oral retinoid used for the treatment of acne. Acitretin (Soriatane) is a oral retinoid used for the treatment of psoriasis. Several topical retinoids have become the mainstay of treatment for acne, including Differin (adapalene), Epiduo (adapalene + benzoyl peroxide), Retin-A Micro (tretinoin), Tazorac (tazarotene), tretinoin, and Ziana (tretinoin +  clindamycin). Tazorac (tazarotene) is also used for the treatment of psoriasis. Renova and other topical retinoids may also be used for the treatment of aging skin. The retinoid helps to generate healthier, plumper skin cells that create a complexion with fewer fine wrinkles.

Retinol
A nonprescription, over- the-counter medication that is a weaker version of the presription topical retinoids.

Rhytides
(see wrinkles)

Ringworm
A fungal infection of the skin caused by a dermatophyte. The same fungi may cause athlete’s foot (tinea pedis) or jock itch (tinea cruris). Ringworm is not caused by a worm.

Rosacea
Rosacea TypesRosacea is a skin disorder, formerly known as “acne rosacea” that is characterized by flushing, erythema (redness),  visible blood vessles (telangiectasias), and papules and pustules on the skin. There are several types of rosacea that are defined by the skin’s appearance. There is also a form of rosacea that affects the eyes (ocular rosacea). The pimples and pustules of rosacea respond to topical medications, such as MetroGel and Finacea, and to oral treatments, such as Oracea (doxycycline). Several of these medications are used for their anti-inflammatory effects. The redness (erythema) and the visible blood vessels of rosacea ay require treatment with laser or light therapy, such as intense pulsed light (IPL).

Learn more about rosacea.

Return to Top


Last updated December 10, 2009

This information is for general educational uses only. It may not apply to you and your specific medical needs. This information should not be used in place of a visit, call, consultation with or the advice of your physician or health care professional. Communicate promptly with your physician or other health care professional with any health-related questions or concerns.

Be sure to follow specific instructions given to you by your physician or health care professional.

This website is certified by Health On the Net Foundation. Click to verify. This site complies with the HONcode standard for trustworthy health information:
verify here.
View Content Policy