Linear lichen planus: a case report

Abstract Lichen planus (LP) is an inflammatory skin disease which is often seen in middle ages and affects the skin, mucous membranes, nails and scalp. Etiology is not clear and there are different clinical types of the disease which are named according to localization, distribution and morphological characteristics of the lesion. Linear lichen planus (LLP) is a rare variant of LP that is characterized by lichenoid, pruritic, violaceous papules, arranging in a linear pattern. Unilateral linear strip-like or segmental lesions follow the lines of Blaschko but does not demonstrate dermatomal distribution. Lichen striatus, linear lichen nitidus, inflammatory linear verrucous epidermal nevus, linear psoriasis, lichen simplex chronicus, incontinensia pigments, linear contact dermatitis can be considered in differential diagnosis. In this case, a case of 24 year-old woman with lesions on left arm is presented and differential diagnosis of this rare clinical form is discussed. Keywords: Linear lichen planus Ozet Liken planus (LP), orta yaslarda sik olan ve deri, mukoza, tirnak ve sacli deriyi tutan inflamatuvar bir deri hastaligidir. Etiyolojisi belli olmayan bu hastaligin, lezyonlarinin lokalizasyon, yayilim ve morfolojik ozelliklerine gore farkli klinik tipleri tanimlanir. Lineer liken planus (LLP) bu hastaligin nadir bir formudur. LLP lineer olarak dizilen likenoid, pruritik, violasoz papuller ile dikkati ceker. Unilateral lineer serit seklinde veya segmental lezyonlar Blaschko cizgilerini izler ama dermatomal yayilim gostermez. Liken striatus, linear liken nitidus, inflamatuvar lineer verrukoz epidermal nevus, lineer psoriasis, liken simpleks kronikus, inkontinensiya pigmenti, lineer kontakt dermatit ayirici tanida dusunulmelidir. Bu olgu sunumunda 24 yasinda bir kadinin sol kolundaki lezyonlarin ayirici tanisi ve nadir gorulen LLP hastaliginin klinik ozellikleri irdelenmistir. Anahtar sozcukler: Lineer liken planus