L91: Hypertrophic disorders of skin
L91.9: Hypertrophic disorder of skin, unspecified
Hypertrophic disorder of the skin, unspecified, is a condition where the skin thickens abnormally. This condition can occur anywhere on the body and is typically marked by raised, hardened skin that often appears red or darker than the person's normal skin tone. It results from an overgrowth of skin cells, also known as keratinocytes, in the outermost layer of skin. The exact cause of this condition is not well understood but it is thought to be linked to various factors like genetic predisposition, certain types of skin injuries, or environmental irritants. Common symptoms include noticeable skin growth, rough or uneven texture, and sometimes itchiness. The progression of the hypertrophic disorder of the skin may vary significantly. Some may remain stable for years, while others may slowly expand over time.
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