What is pseudo Koebner?

Pseudo Koebner′s phenomenon is appearance of similar morphological skin lesions along the lines of trauma in infective conditions like verrucae [Figure – 9] and molluscum contagiosum. It is due to direct transmission of the virus following trauma.

What is positive Nikolsky sign?

If the test result is positive, the very thin top layer of skin will shear off, leaving skin pink and moist, and usually very tender. A positive result is usually a sign of a blistering skin condition. People with a positive sign have loose skin that slips free from the underlying layers when rubbed.

What are Wickham striae?

Introduction. The term Wickham striae (WS) was coined by Louis Frédéric Wickham in the year 1895 and corresponds to fine white or gray lines or dots seen on the top of the papular rash and oral mucosal lesions of Lichen planus (LP),[1] also called as Lichen Ruber Planus.

Is koebner phenomenon rare?

According to a 2019 study, the Koebner phenomenon affects around 25 to 30 percent of people with psoriasis.

What conditions does Koebnerize?

Doctors sometimes call it “isomorphic response” or “Koebnerization.” It happens most often in people with psoriasis, but it happens in other skin conditions, too, including warts and vitiligo. If you have active flares, you are more likely to have a Koebner response.

Is Nikolsky sign positive in erythema multiforme?

The Nikolsky sign is negative (ie, top layers of the skin do not slip away from the lower layers when slightly rubbed). The lesions are symmetrical, predominantly on the acral extensor surfaces of the extremities, and they spread centripetally to involve the abdomen and back.

What are Civatte bodies in lichen planus?

Civatte bodies (CBs) are seen as rounded, homogenous, eosinophilic masses on routine H and E staining lying in the deeper parts of epidermis/epithelium and more frequently in dermis/connective tissue. They are known as CBs (in epithelium/epidermis), colloid bodies, or hyaline bodies (in connective tissue).