Washington Esthetician State Board Practice Exam 2025 – Complete Prep Resource

The letter B in the American Cancer Society's ABCD checklist stands for "Border." This checklist is a vital tool for identifying potential signs of skin cancer, specifically melanoma.

When evaluating a mole or skin lesion, the border's characteristics are critical. A benign mole typically has a smooth, even border, whereas the borders of a mole that may be concerning are often irregular, jagged, or blurred. Observing these border irregularities can be a key indicator that a lesion may be pre-cancerous or cancerous, prompting further examination and potential biopsy.

Understanding the specifics of each component in the ABCD checklist—Asymmetry, Border, Color, Diameter—helps individuals recognize changes in their skin that necessitate a consultation with a healthcare professional. This proactive approach can lead to earlier detection and treatment of skin cancer, which can significantly improve outcomes.