Koebnerization of Lichen Sclerosus Et Atrophicus at Insulin Injection Sites - A Rare Case with Dermoscopic Features.

Lichen sclerosus et atrophicus (LSEA), also known as lichen sclerosus (LS), is a disabling, cosmetically disfiguring condition predominantly affecting the anogenital region of pre- and postmenopausal females. Extragenital LS is relatively less common and occurs predominantly on the trunk and neck. Koebnerization or isomorphic phenomenon is reported occasionally in LS after trauma like radiotherapy. A few case reports describe koebnerization of LS at injection sites. We describe the first such case in India of LS koebnerizing at insulin injection sites with dermoscopic features.