In the America Cancer Society's ABCD checklist, what does B stand for?

In the American Cancer Society's ABCD checklist for evaluating moles and skin lesions, the letter 'B' stands for "Border." This criterion is used to assess the characteristics of a mole, specifically looking for irregular or jagged edges. A mole with a smooth, even border is considered more typical and less worrisome, while those with uneven, scalloped, or notched borders may indicate a higher risk for melanoma or other skin cancers. This focus on the border of a mole is critical because changes in shape and definition can signal the potential for malignancy, making it an essential part of early detection efforts for skin cancer.