Koebner phenomenon

Full Definition

The Koebner phenomenon, also known as isomorphic response, refers to the appearance of new skin lesions at sites of physical trauma in patients with pre-existing dermatologic conditions. This phenomenon is classically associated with psoriasis, vitiligo, and lichen planus. In pediatric dermatology, recognizing koebnerization is important for counseling families about activity modifications and wound care to prevent disease extension. The phenomenon typically occurs 10-20 days after the inciting trauma.

Usage

Usage note: Specify which underlying condition is demonstrating koebnerization.

In Context

• "New psoriatic plaques developed along the child's surgical scar, demonstrating Koebner phenomenon." — Follow-up visit note
• "The patient was counseled about Koebner phenomenon and advised to avoid skin trauma." — Patient education documentation