Oregon Written Tattoo Practice Test

What is the definition of an erosion in the context of skin lesions?

1. Loss of all or portions of the epidermis

2. Small fluid-filled blister

3. Larger fluid-filled lesion

4. Thickened skin

The correct answer is: Loss of all or portions of the epidermis

In the context of skin lesions, erosion refers specifically to the loss of all or part of the epidermis, which is the outermost layer of the skin. This condition typically results in a moist or red surface that is often painful, as it exposes the underlying tissue. Erosions can occur due to various factors, including friction, inflammation, or disease processes. Recognizing erosion is important in dermatology as it is significant in differentiating it from other types of skin lesions. For instance, fluid-filled blisters or larger lesions are distinctly classified based on their characteristics, such as being filled with fluid rather than representing a loss of skin integrity. Similarly, thickened skin is a sign of prolonged irritation or a condition like lichenification, which involves a change in texture rather than erosion of the epidermis itself. Understanding these distinctions helps in diagnosing skin conditions accurately and determining the appropriate treatment.