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Xeroderma, xerosis or xerosis cutis, or simply dry skin, is a skin condition characterized by excessively dry skin. [2] The term derives from Greek ξηρός (xeros) 'dry' and δέρμα (derma) 'skin'. In most cases, dry skin can safely be treated with moisturizers (also called emollients).
[1] [2] [3] In the elderly, xerosis, is the most common cause for an itch due to the degradation of the skin barrier over time. [4] However, the cause of senile pruritus is not clearly known. [ 5 ] Diagnosis is based on an elimination criteria during a full body examination that can be done by either a dermatologist or non-dermatologist physician.
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]
Ichthyosis vulgaris (also known as "autosomal dominant ichthyosis" [1] and "Ichthyosis simplex" [1]) is a skin disorder causing dry, scaly skin.It is the most common form, and one of the mildest forms, of ichthyosis, [2] [3]: 486 affecting around 1 in 250 people. [4]
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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]
Xeroderma pigmentosum (XP) is a genetic disorder in which there is a decreased ability to repair DNA damage such as that caused by ultraviolet (UV) light. [1] Symptoms may include a severe sunburn after only a few minutes in the sun, freckling in sun-exposed areas, dry skin and changes in skin pigmentation. [1]
Appearance of C. xerosis colonies on blood agar. Corynebacterium xerosis is a gram-positive, rod-shaped bacterium in the genus Corynebacterium.Although it is frequently a harmless commensal organism living on the skin and in the mucous membranes, C. xerosis is also a clinically relevant opportunistic pathogen that has been attributed to many different infections in animals and humans.