What two dermatologic red flags require urgent evaluation?

What two dermatologic red flags require urgent evaluation?

• A. A pigmented lesion with stable size and no changes.
• B. A pigmented lesion with sudden changes in size, shape, color (ABCDE changes), and non-healing, enlarging ulcers.
• C. A pink lesion with no changes.
• D. A flat lesion with uniform color.

Answer: (B)

The main idea is to recognize signs that a skin lesion might be cancerous and needs prompt check. The two red flags are evolution and ulceration. Evolution means the lesion suddenly changes in size, shape, or color (the ABCDE pattern—asymmetry, border irregularity, color variation, diameter, evolution). When a pigmented lesion rapidly grows, alters its outline, or shifts color, it raises concern for melanoma and warrants urgent evaluation. Non-healing, enlarging ulcers add another layer of risk, suggesting tissue breakdown or invasion that can accompany malignancy. By contrast, a pigmented lesion that remains stable in size and color, or a pink lesion with no changes, or a flat lesion with uniform color, is typically benign and not an immediate emergency, though any new or changing lesion should still be examined eventually.