Hydrogen peroxide 40% versus trichloroacetic acid 70% in the treatment of seborrheic keratosis.

BACKGROUND AND OBJECTIVE: 40% versus TCA 70% in SK treatment. METHODS: 40% (n = 32) or TCA 70% (n = 32) applied over two to four sessions at 2‑week intervals. Outcomes included physician lesion assessment (PLA), lesion dimensions, subjective self-assessment (SSA), dermoscopic features, adverse events, and patient satisfaction. CONCLUSION: is safer but less effective. Limitations include the lack of prospective trial registration, the single-center design, the small sample size with short follow-up, potential performance bias, and limited generalizability. This study was not prospectively registered.