Facts on File Encyclopedia of Health and Medicine

C callus An accumulation of keratocytes that form a thickened area of SKINin response to repeated friction or pressure, typicall ...

ance and symptoms. Usually no blood or other laboratory tests are necessary, unless the doctor suspects systemic infection (SEPT ...

uses a phenol solution to achieve this result, which is appropriate for treating moderate facial blemishes, acne scars, sun dama ...

compress and irritate the nerves in the underlying tissues, and continue to grow as long as the pres- sure against the toes cont ...

D dandruff A common symptom in which the sebaceous glands on the scalp increase their activ- ity, accelerating the SKIN’s normal ...

environment that encourages a normally present fungus, Malassezia (also called Pityrosporum), to flourish in abundance. Malassez ...

Symptoms and Diagnostic Path The symptoms of decubitus ulcer depend on its stage of development. Health-care providers clas- sif ...

Atopic dermatitis A chronic condition also called eczema, atopic dermatitis typically first appears in infancy or early childhoo ...

tective epidermis exposes the inner layers of skin and tissues to infection. Treatment aims to restore skin integrity and functi ...

quency and severity of outbreaks. Though der- matitis is seldom life-threatening, it can signifi- cantly interfere with QUALITY ...

which lesions can attack internal structures as well as the skin. Symptoms and Diagnostic Path The characteristic appearance of ...

E eczema See DERMATITIS. ecchymosis The clinical term for a bruise. Ecchymosis occurs when there is bleeding into the layers of ...

in representative bullae, which distinguishes the general type of epidermolysis bullosa. Molecular examination, including DNA mu ...

ures include HAND WASHING after coughing or sneezing. See also SCARLET FEVER. erythema multiforme A HYPERSENSITIVITY REAC- TION, ...

viewed under ultraviolet light, the areas of infec- tion appear a deep coral color. Corynebacteria, BAC- TERIAnormally present o ...

F–G facelift See RHYTIDOPLASTY. Fitzpatrick skin type A commonly used classifi- cation system for identifying a person’s SKINcha ...

as the doctor directs. In people who frequently have folliculitis or who are on long-term antibiotic therapy such as for ACNE, t ...

skin turns red and BURNS or hurts, sometimes severely. Treatment Options and Outlook Prompt treatment is essential to save the a ...

erection, is involuntary. Researchers believe it is in part the consequence of the release of stress hor- mones, primarily EPINE ...

H hair The fibers that grow from the hair follicles. Not far above the root of the hair follicle the cells that form the hair fi ...