Oregon Written Tattoo Practice Test

What characteristics define flat lesions that cannot be palpated?

1. Sharp, circumscribed borders

2. Irregular, diffuse borders

3. Elevated, fluid-filled

4. Rough, scaly texture

The correct answer is: Sharp, circumscribed borders

Flat lesions that cannot be palpated are distinguished by their sharp, circumscribed borders. This characteristic indicates that the lesion has a definite outline, making it easier to identify and assess. Sharp borders typically suggest a well-defined separation between the lesion and the surrounding skin, which is important for diagnosis and treatment. In contrast, irregular and diffuse borders usually indicate more complex lesions that may blend into the surrounding tissue, making them harder to identify clearly. Elevated and fluid-filled lesions, such as blisters or pustules, are inherently three-dimensional and can be palpated, while rough, scaly textures are more descriptive of the surface of the skin but do not pertain to the palpability or flatness of the lesion itself. Thus, the defining feature of flat lesions that cannot be palpated is indeed their sharp, clearly defined edges.