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Skin sloughing is the process of shedding dead surface cells from the skin. It is most associated with cosmetic skin maintenance via exfoliation , but can also occur biologically or for medical reasons.
An eschar (/ ˈ ɛ s k ɑːr /; Greek: ἐσχάρᾱ, romanized: eskhara; Latin: eschara) is a slough [1] or piece of dead tissue that is cast off from the surface of the skin, particularly after a burn injury, but also seen in gangrene, ulcer, fungal infections, necrotizing spider bite wounds, tick bites associated with spotted fevers and exposure to cutaneous anthrax.
A dragonfly in its radical final moult, metamorphosing from an aquatic nymph to a winged adult.. In biology, moulting (British English), or molting (American English), also known as sloughing, shedding, or in many invertebrates, ecdysis, is a process by which an animal casts off parts of its body to serve some beneficial purpose, either at specific times of the year, or at specific points in ...
The histological picture involves thinner, weaker attachments of the skin lesion itself to the normal skin – resulting in easier dislodgement. The formation of new blisters upon slight pressure (direct Nikolsky) and shearing of the skin due to rubbing (indirect Nikolsky) is a sign of pemphigus vulgaris, albeit not a 100% reliable diagnosis. [ 8 ]
Sloughing of the epidermis and exposure of the dermal layer clinically characterize moist desquamation. Moist desquamation presents as tender, red skin associated with serous exudate , hemorrhagic crusting, and has the potential for development of bullae .
According to Robbins's pathology, "ulcer is the breach of the continuity of skin, epithelium or mucous membrane caused by sloughing out of inflamed necrotic tissue." [citation needed] Common forms of ulcers recognized in medicine include: [citation needed] Ulcer (dermatology), a discontinuity of the skin or a break in the skin.
Medical illustrations have been made possibly since the beginning of medicine [1] in any case for hundreds (or thousands) of years. Many illuminated manuscripts and Arabic scholarly treatises of the medieval period contained illustrations representing various anatomical systems (circulatory, nervous, urogenital), pathologies, or treatment methodologies.
EHD has been found in some domestic ruminants and many species of deer including white-tailed deer, mule deer, elk, and pronghorn antelope. [4] Seropositive black-tailed deer , fallow deer , red deer , wapiti , and roe deer have also been found, which essentially means that they were exposed to the disease at some time in the past but may not ...