Genital Warts Glossary Q - Z
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A - F G - I J - P Q - Z
Salicylic acid - Salicylic acid (from the Latin word for the willow tree, Salix,
from whose bark it can be obtained) is a beta hydroxy acid (BHA) with the formula
C6H4(OH)CO2H, where the OH group is adjacent to the carboxyl group. This colorless
crystalline organic acid is widely used in organic synthesis and functions as a plant
hormone. It is derived from the metabolism of salicin. It is probably best known
as a compound that is chemically similar but not identical to the active component
of aspirin. In fact, salicylic acid is a metabolite of aspirin, the product of esterase
hydrolysis in the liver.
Seborrheic keratoses - Seborrheic keratosis consists of benign, verrucous (wart-like),
often pigmented, greasy lesions consisting of proliferating epidermal cells which
usually occur after the third decade. A common occurrence among black people is the
appearance of many small lesions on the face, known as dermatosis papulosa nigra.
Leser-Trelat sign, the explosive onset of multiple pruritic seborrheic keratoses,
often with an inflammatory base, can be an ominous sign of internal malignancy, especially
stomach carcinoma.
Solar keratoses - Actinic keratosis (also called solar keratosis, or AK) is a premalignant
condition of thick, scaly, or crusty patches of skin. It is most common in fair-skinned
people who are frequently exposed to the sun, because their pigment isn't very protective.
It usually is accompanied by solar damage. Since some of these pre-cancers progress
to squamous cell carcinoma, they should be treated. When skin is exposed to the sun
constantly, thick, scaly, or crusty bumps appear. The scaly or crusty part of the
bump is dry and rough. The growths start out as flat scaly areas, and later grow
into a tough, wart-like area.
Trichloroacetic acid (TCA) - Trichloroacetic acid (also known as trichloroethanoic
acid) is an analogue of acetic acid in which the three hydrogen atoms of the methyl
group have all been replaced by chlorine atoms. It is a strong acid, comparable to
sulfuric acid. It is prepared by the reaction of chlorine with acetic acid in the
presence of a suitable catalyst.
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