“Keloids may arise from scars that result from any cause of skin trauma or infection. Keloids, unlike hypertrophic scars, are not confined to the margins of the primary injury. Hypertrophic scars are more likely on extensor surfaces of the body, typically develop soon after the inciting injury, and are more likely to regress with time.” AAFP
Kundu RV, Patterson S: Dermatologic conditions in skin of color: Part II. Disorders occurring predominately in skin of color.
Am Fam Physician 2013;87(12):859-865.