What are the Histological Changes Due to Chronic Sun Exposure?
Chronic sun exposure induces several histological changes in the skin:
Elastosis: The accumulation of abnormal elastic fibers in the dermis, known as solar elastosis, can be observed. These fibers appear basophilic and are considered a hallmark of photoaging. Thickening of the Stratum Corneum: The outermost layer of the epidermis, the stratum corneum, often becomes thickened, a condition known as hyperkeratosis. Inflammation: Chronic exposure can lead to a mild, chronic inflammatory infiltrate in the dermis, consisting mainly of lymphocytes. Changes in Collagen: Collagen fibers in the dermis can become fragmented and disorganized, reducing the skin's structural integrity and elasticity. Epidermal Atrophy: Thinning of the epidermis can occur, making the skin more fragile and susceptible to injury.
