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What are keloids and hypertrophic scars? A keloid scar is a firm, smooth, hard growth that occurs as a result of excessive scar formation. Keloids occur after skin injury; rarely, keloids can occur spontaneously without any significant preceding skin injury.
13 Ιουλ 2023 · A keloid scar is a thick raised scar. It can occur wherever you have a skin injury but usually forms on earlobes, shoulders, cheeks or the chest. If you're prone to developing keloids, you might get them in more than one place.
Keloids form within scar tissue. Collagen, used in wound repair, tends to overgrow in this area, sometimes producing a lump many times larger than that of the original scar. They can also range in color from pink to red. [ 6 ] . Although they usually occur at the site of an injury, keloids can also arise spontaneously.
Both these abnormal scar types involve excessive collagen deposition leading to the formation of raised scar tissue, but in keloids, scar formation extends beyond the boundaries of the original wound and shows no regression.
20 Μαΐ 2020 · Introduction. Scar is a cutaneous development in the skin, culminated by biological wound healing processes. The skin restores the lost tissues by scarring where the new cell population resides in a newly constructed connective tissue with a new vasculature.
28 Ιουλ 2023 · When skin is injured, fibrous tissue called scar tissue forms over the wound to repair and protect the injury. In some cases, extra scar tissue grows, forming smooth, hard growths called...
30 Νοε 2016 · Keloid scar, dermal benign fibro-proliferative growth that extends outside the original wound and invades adjacent dermal tissue due to extensive production of extracellular matrix, especially collagen, which caused by over expression of cytokines and growth factors.
