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The Koebner phenomenon describes the appearance of new skin lesions of a pre-existing dermatosis on areas of cutaneous injury in otherwise healthy skin. It is also known as the Köbner phenomenon and isomorphic response. Linear lesions due to Koebner phenomenon in lichen planus. Linear lesions due to Koebner phenomenon in lichen planus.
Jun 4, 2015 · Vitiligo also favours sites of injury; this is called the isomorphic Koebner phenomenon. Injury can be induced by either: Physical (cuts, abrasions, scratching) Mechanical (friction, chronic pressure, eg, eye rubbing, lip-licking, watches, tight-fitting clothes) Burns (chemical, sunburn) Inflammation (psoriasis, herpes zoster, dermatitis)
Display the Koebner phenomenon. Photosensitive lesions that appear whitish (dyschromic) pinhead and papules are called actinic lichen nitidus, which is now considered a separate and distinct entity from LPA. LPA is usually diagnosed based on lesion distribution and skin biopsy results. Lichenoid drug eruption
Psoriasis can demonstrate the Koebner phenomenon. This involves the generation of new lesions on the skin that has been damaged or irritated such as by injury, burns etc. When psoriatic plaques clear up, they may leave brown or pale marks (postinflammatory hypo- or hyperpigmentation) that can be expected to fade over several months.
The koebner phenomenon describes the appearance of new lesions of an existing skin disease within a cutaneous injury. A tattoo can result in psoriasis, lichen planus or vitiligo by this mechanism. Skin infections. Infection is not common after tattooing.
Koebner phenomenon. Psoriatic plaques may develop at the sites of skin trauma, including scratches, sunburn, tight clothing, surgery; The healing skin in those genetically predisposed triggers excessive keratinocytes proliferation; Koebnerised lesions are frequently linear in shape; Koebnerised psoriasis
Lichen nitidus usually begins in childhood, particularly preschool and school-aged children, or in young adult life. It affects both sexes equally and occurs in all races. The cause of lichen nitidus is unknown. Lichen nitidus has been reported in association with: Lichen planus. Crohn disease.
Koebner phenomenon is a common feature; Commonly located on trunk or extensor aspect of the limbs but can be widespread occurring anywhere on the skin; Hands, elbows, and knees are the common initial sites involved in the inherited form; Mucosal lesions have been described; Variable phenotype in the familial form, even within the one family
Isomorphic response (Koebner phenomenon) Pathergy; Introduction. Impaired wound healing may be attributed to defects in the normal tissue response to injury and to poor treatment of the wound. Chronic wounds are defined as those that do not appear to follow the normal healing process in less than 4 weeks.
Neutrophilic dermatoses often arise at the site of injury such as a needle prick, biopsy or insect bite. This reaction to injury is known as Koebner phenomenon or isomorphic response. Pathergy is the production of a papule or pustule at the site of a needle prick. Neutrophilic dermatoses include: Sweet syndrome; Pyoderma gangrenosum
