Final answer:
Hyperkeratosis is considered a secondary lesion, which arises from primary lesions or as a consequence of skin conditions.
Step-by-step explanation:
Hyperkeratosis is a condition characterized by thickening of the stratum corneum, which is the outermost layer of the skin. This thickening is often a response to repeated friction, pressure, or other forms of irritation. In categorizing skin lesions, hyperkeratosis is considered a secondary lesion because it develops from a primary lesion or as a consequence of a disease or other skin condition. Secondary lesions are changes in the skin that result from the natural progression of a skin condition, manipulation (such as scratching), or the healing process.