Certified Wound Ostomy Nurse (CWON) Practice Test

How does a keloid scar differ from a hypertrophic scar?

1. It is always flat and less noticeable

2. It only occurs in certain skin types

3. It extends beyond the margins of the original wound

4. It is less raised than a hypertrophic scar

The correct answer is: It extends beyond the margins of the original wound

A keloid scar is characterized by its tendency to extend beyond the original boundaries of the wound. This overgrowth of scar tissue occurs due to an abnormal response to injury, where the body produces too much collagen during the healing process. Unlike hypertrophic scars, which remain within the limits of the incision or injury and can soften over time, keloids can continue to grow larger and do not regress. This distinction in growth behavior is a critical aspect that separates keloid scars from hypertrophic scars. In contrast, the other options describe characteristics that do not align with the specific nature of keloid scars. Keloids are not always flat or less noticeable; they can be quite prominent and vary significantly in appearance. Additionally, while certain skin types may be more prone to keloid formation, this is not a defining characteristic that distinguishes them from hypertrophic scars. Lastly, keloids are typically more raised than hypertrophic scars, further emphasizing their unique profile in scar formation.