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Textbook of Cosmetic Dermatology Fifth Edition PDF

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Textbook of Cosmetic Dermatology Fifth Edition PDF Free Download

Textbook of Cosmetic Dermatology Fifth Edition PDF

Many characteristics of the body are reected in the skin, gender being a prominent one. Genetic and hormonal differences affect skin structure and function, resulting in variations between women and men and causing these gender variations to change with age. In addition, exogenous factors differ according to differences in lifestyle between the sexes. During the last few decades, methodologies used in dermatological research have improved substantially, providing means of objective evaluation of skin function and characteristics. The number of studies addressing various aspects of differences between women and men has increased in the last few years along with the growing interest in studying gender-related differences of physiological and disease processes (1,2). However, the subject has not yet been systematically studied, so much of the data are by-products of studies with a different focus. This chapter outlines the various aspects of physiological differences between the skin of women and men, based on the available data. STRUCTURAL AND ANATOMICAL CHARACTERISTICS (TABLE 1.1) The skin of female frogs is thicker than that of males in all body regions (3) (the opposite is true for rat skin[4]). In humans, skin thickness (epidermis and dermis) is greater in men than in women (5), up to 1.428 times (6), whereas the subcutaneous fat thickness is greater in women (7). The skin of men is thicker across the entire age range of 5–90 years (8). Hormonal inuence on skin thickness was demonstrated when conjugated estrogens were given to postmenopausal women (9). Following 12 months’ therapy, the dermis was signi‘cantly thicker, and histologic improvement in the previously atrophic epidermis was noted. Epidermal thickness alone, as measured by optical coherence tomography, does not differ between men and women, except for the forehead epidermis which is thinner in women (10). Skin collagen and collagen density were measured in addition to dermal thickness (11). The skin of men demonstrated a gradual thinning with advancing age (12–93 years), whereas the thickness of women’s skin remained constant up until the ‘fth decade, after which it decreased with age. The male forearm skin contained more collagen at all ages in the range 15–93 years. In both sexes there was a linear decrease in skin collagen with age.

More Info
Year:2017
Edition:5
Publisher:CRC Press
Language:english
Pages:606 / 607
ISBN 10:1482257343
ISBN 13:978-1-4822-5734-2
Series:Series in Cosmetic and Laser Therapy
File:PDF, 37.06 MB