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Hyperkeratosis is thickening of the stratum corneum (the outermost layer of the epidermis, or skin), often associated with the presence of an abnormal quantity of keratin, [1] and is usually accompanied by an increase in the granular layer. As the corneum layer normally varies greatly in thickness in different sites, some experience is needed ...
Palmoplantar keratodermas are a heterogeneous group of skin disorders characterized by abnormal thickening (scleroderma) of the stratum corneum of the palms and soles. Autosomal recessive, dominant, X-linked, and acquired forms have all been described in medical literature. [1]: 505 [2]: 211 [3]
Pachyderma, or pachydermia, is the thickening of skin like that of a pachyderm (a tough-skinned animal such as an elephant, rhinoceros, tapir or hippopotamus). [1] It occurs in the condition pachydermoperiostosis, an autosomal genetic disorder. [2] It can also occur in acromegaly, elephantiasis, and podoconiosis. [3]
This disorder causes tissue thickening and hardening due to excess collagen production. It can affect the skin, tissues, blood vessels, and sometimes internal organs.
Fissure is a lesion in the skin that is usually narrow but deep. [29] [33] Induration is dermal thickening causing the cutaneous surface to feel thicker and firmer. [29] Atrophy refers to a loss of skin, and can be epidermal, dermal, or subcutaneous. [30] With epidermal atrophy, the skin appears thin, translucent, and wrinkled. [29]
26 pictures of skin rashes to help you identify your skin rash. ... but it’s believed to be related to an abnormal immune system response, and factors that may trigger or worsen rosacea include ...
Ichthyosis (also named fish scale disease) [1] is a family of genetic skin disorders characterized by dry, thickened, scaly skin. [2] The more than 20 types of ichthyosis range in severity of symptoms, outward appearance, underlying genetic cause and mode of inheritance (e.g., dominant, recessive, autosomal or X-linked). [3]
The skin weighs an average of four kilograms, covers an area of two square metres, and is made of three distinct layers: the epidermis, dermis, and subcutaneous tissue. [1] The two main types of human skin are: glabrous skin, the hairless skin on the palms and soles (also referred to as the "palmoplantar" surfaces), and hair-bearing skin. [3]