A lesion is defined as which of the following?

• A. A temporary color change in the skin
• B. A type of skin infection
• C. An allergic reaction on the surface of the skin
• D. A structural change in the tissue caused by damage or injury

Answer: (D)

A lesion represents a disruption of the normal tissue structure. It outcomes from damage or injury that changes the architecture of the tissue itself, not just superficial color changes or processes like infection or allergic reactions. So a lesion is about actual structural alteration—think of a cut, blister, ulcer, scar, or tumor—where the tissue’s organization has been visibly and physically changed. This distinguishes it from temporary color changes or surface reactions that don’t reflect a lasting alteration in tissue structure.