Which skin lesion is characterized as flat and discolored?

• A. Vesicle
• B. Macule
• C. Pustule
• D. Patch

Answer: (B)

The correct answer is the macule, as it is specifically defined as a flat and discolored skin lesion. Macules are typically less than 1 centimeter in diameter and can appear in various colors, including brown, red, or white, depending on the underlying cause or condition. They do not involve any elevation or change in texture of the skin, thus making them distinct from other lesions.

In contrast, a vesicle is a small, fluid-filled blister that is raised above the surrounding skin, while a pustule is a small elevation containing pus. A patch is similar to a macule but is larger than 1 centimeter in diameter. Understanding these definitions helps in differentiating between various skin lesions and recognizing their characteristics in clinical practice.