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Aging Skin: Blemishes and Nonmelanoma Skin Cancers

Source: www.healthandage.com
Topic: Skin Aging
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Sort Desciption: WHAT OCCURS WHEN SKIN AGES? Aging Process One or more benign lesions are present on the skin of virtually all individuals older than 65, and the incidence of skin cancer increases dramatically with age. ...

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WHAT OCCURS WHEN SKIN AGES? Aging Process One or more benign lesions are present on the skin of virtually all individuals older than 65, and the incidence of skin cancer increases dramatically with age. Like all the bodys tissues, the skin undergoes many changes in the course of the normal aging process: The cells divide more slowly, and the inner layer of skin (the dermis) starts to thin. Fat cells beneath the dermis begin to atrophy (diminish). In addition, the ability of the skin to repair itself diminishes with age, so wounds are slower to heal. The thinning skin becomes vulnerable to injuries and damage. The underlying network of elastin and collagen fibers, which provides scaffolding for the surface skin layers, loosens and unravels. Skin then loses its elasticity. When pressed, it no longer springs back to its initial position but instead sags and forms furrows. The sweat and oilsecreting glands atrophy, depriving the skin of their protective waterlipid emulsions. The skins ability to retain moisture then diminishes and it becomes dry and scaly. Various blemishes and precancerous and cancerous lesions appear that are not only unsightly, but potentially serious are also prevalent. The skin is also more fragile and may bruise or tear easily and take longer to heal. The Skin The skin has three layers and consists of different cell types: The outer layer of the skin, the epidermis, is only about 20 cells deep, roughly as thick as a sheet of paper. It is composed of skin cells called keratinocytes. The top part of the epidermis, called the stratum corneum, or horny layer, is composed of dead keratinocytes that are constantly shed. The living keratinocytes underneath are referred to as squamous cells. The lowest part of the epidermis consists of basal cells. These are constantly reproducing to from new keratinocytes. Below this layer lies the dermis, ranging in ...

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