TCA
Pronunciation: tee-see-AY
Also written as: TCA — Trichloroacetic Acid
Acronym for trichloroacetic acid, a medium-to-deep chemical peeling agent used in cosmetic dermatology for skin resurfacing and pigmentation correction.
Full Definition
Trichloroacetic acid (TCA) is applied topically at varying concentrations (10–50%+) to induce controlled protein coagulation and superficial-to-deep skin injury, promoting epidermal regeneration and dermal remodelling. At 10–35% concentrations it achieves medium-depth resurfacing; above 40–50% it approaches deep peel territory. TCA peels are used for dyschromia, acne scarring, fine lines, and sun damage. Editors must ensure concentration percentages are accurately stated and that the depth classification (superficial, medium, deep) matches the stated concentration in any clinical or marketing document.
Usage
Usage note: Always expand on first use. Ensure peel depth classification is consistent with the stated concentration in the document.
In Context
- "A 20% TCA solution was applied in three passes to achieve a medium-depth frost across the treatment area." — Procedure documentation
- "The brochure listed 'TCA' without expansion; first-use expansion to 'trichloroacetic acid (TCA)' is required." — Editorial checklist comment