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Dr. Alexiades says that she believes keloids behave like benign tumors of the skin; the fibroblasts—the cells that make collagen—are proliferating and producing collagen out of control in keloids.
The beneficial effects of silicone gel sheeting on the treatment and prevention of these two scars have been confirmed. [10] Since most patients develop hypertrophic and keloid scars within 3 months after surgery or injury, the silicone gel sheeting therapy should be started in the early repair phase to achieve an optimal therapeutic effect.
A keloid scar is benign and not contagious, but sometimes accompanied by severe itchiness, pain, [2] and changes in texture. In severe cases, it can affect movement of skin. In the United States, keloid scars are seen 15 times more frequently in people of sub-Saharan African descent than in people of European descent. [3]
A hypertrophic scar is a cutaneous condition characterized by deposits of excessive amounts of collagen which gives rise to a raised scar, but not to the degree observed with keloids. [1] Like keloids, they form most often at the sites of pimples, body piercings, cuts and burns. They often contain nerves and blood vessels.
However, they can be itchy or painful in some individuals. They tend to be most common on the shoulders and chest. Hypertrophic scars and keloids tend to be more common in wounds closed by secondary intention. [8] Surgical removal of keloid is risky and may exacerbate the condition and worsening of the keloid.
Pseudofolliculitis nuchae, a related condition, occurs on the back of the neck, often along the posterior hairline, when curved hairs are cut short and allowed to grow back into the skin. Left untreated, this can develop into acne keloidalis nuchae, a condition in which hard, dark keloid-like bumps form on the neck. Both occur frequently in ...