It is important to be able to recognize precancerous and cancerous skin lesions. Most benign lesions are symmetrical. Asymmetrical lesions should be evaluated by a physician. Most benign lesion have smooth borders. Jagged edges merit evaluation.
Most benign lesions are of one color.
Multiple or variegated colors merit evaluation. D iameter-Pigmented lesions larger than 6 mm merit evaluation. E very change that occurs in a lesion requires special attention, he said. The threat of sun's toxins should not be underestimated.