What is defined as any measurable variation from normal structure of the skin?

The term that accurately describes any measurable variation from the normal structure of the skin is skin lesions. Skin lesions encompass a wide range of abnormal structures or changes in skin appearance, including but not limited to wounds, infections, tumors, and other forms of inflammation. They can be identified and characterized in various ways, such as their shape, size, color, and texture, which help in diagnosing specific skin conditions or diseases.

In contrast, skin imbalances would generally refer to conditions that disrupt the regular functioning of the skin, such as changes in oil production or moisture levels, which do not specifically address structural variations. Dermatitis specifically denotes inflammation of the skin, which is a symptom or condition rather than a measurable variation. Rashes are a broader term that can include various types of skin lesions but do not specifically define measurable changes in skin structure. Thus, skin lesions are the most precise term for indicating any structural abnormality in the skin.