What is the primary feature of a malignant melanoma?

• A. Flat, round lesions
• B. Irregular borders and multiple colors in a mole
• C. Pink and scaly patches
• D. Uniform color and shape

Answer: (B)

The primary feature of a malignant melanoma is characterized by irregular borders and multiple colors in a mole. This distinctive appearance is important in identifying melanoma as it represents the uncontrolled growth of melanocytes, the cells that produce pigment in the skin.

Melanomas often exhibit asymmetry, meaning that one half of the mole does not match the other. The irregular borders can be jagged or blurred rather than well-defined, which is another key indicator of the potential malignancy. Moreover, the presence of multiple colors, including shades of brown, black, tan, pink, or even red, reflects the heterogeneity in cell types and stages of growth within the mole, distinguishing it from benign lesions that typically have a uniform color.

This irregularity and variability are critical for healthcare professionals in skin examinations, as they often remind them to consider further evaluation or biopsy, as these characteristics are high-risk markers for skin cancer.