Our Dermatol Online Our Dermatol Online 2081-9390 Our Dermatology Online Poland OURD-8-218 10.7241/ourd.20172.60 Clinical Image Linear lichen nitidus: An unusual clinical presentation! Mohamed Mariem 1 Soua Yosra 1 Moussa Adnène 2 Zili Jameleddine 1 Departement of Dermatology, Monastir University Hospital, College of Medicine of Monastir, Monastir, Tunisia Department of Pathology, Fattouma Bourguiba University Hospital, Monastir, Tunisia Corresponding author: Dr. Mariem Mohamed, E-mail: mariemmohamed79@yahoo.fr 2017 8 2 218 219 01092016 09112016 Copyright: © Our Dermatol Online 2 2017

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 <p>Lichen nitidus (LN) is a rare chronic inflammatory disease of unknown etiology. It predominantly affects children and young adults. Its clinical manifestation typically corresponds to erythematous or flesh-colored, asymptomatic or little pruritic mini papules, often located in the trunk, genitalia, and extremities. The linear arrangement of this dermatosis seems rare. To our knowledge, only 2 cases of linear lichen nitidus have been reported in the literature [<xref ref-type="bibr" rid="ref1">1</xref>,<xref ref-type="bibr" rid="ref2">2</xref>]. Our case hence corresponds to the third linear LN case.</p> <p>This was a 23-year-old girl with no notable medical history, who consulted for papular discreetly pruritic lesions of the right hand extending to the forearm. The cutaneous examination revealed multiple erythematous millimeters, brilliant mini papules, taking a linear arrangement (<xref ref-type="fig" rid="F1">Fig. 1</xref>). The rest of the integument, the mucous membranes, and the skin appendages were unharmed. The histological examination of a biopsy specimen showed a focally acanthotic epidermis with ortho-hyperkeratosis and a dense inflammatory infiltrate occupying the widened dermal papillae (<xref ref-type="fig" rid="F2">Fig. 2</xref>). The papillary infiltrate was granulomatous comprising lymphocytes, histiocytes and giant cells with the presence of some apoptotic bodies (<xref ref-type="fig" rid="F3">Fig. 3</xref>). In our case, the diagnosis strongly suspected of typical skin lesions was confirmed by the histological study.</p> <fig id="F1"> <label>Figure 1</label> <caption> <p>Erythematous millimeters, brilliant mini papules, taking a linear arrangement in the right hand.</p> </caption> <graphic xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="OURD-8-218-g001.tif"/> </fig> <fig id="F2"> <label>Figure 2</label> <caption> <p>Lichenoid infiltrates of widened dermal papillae (H&E ×100).</p> </caption> <graphic xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="OURD-8-218-g002.tif"/> </fig> <fig id="F3"> <label>Figure 3</label> <caption> <p>Granulomatous infiltrate comprising lymphocytes, histiocytes and giant cells with the presence of some apoptotic bodies on top right (H&E ×200).</p> </caption> <graphic xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="OURD-8-218-g003.tif"/> </fig> </sec> </body> <back> <ref-list> <title>REFERENCES Prigent F Cavelier-Balloy B Lemarchand-Venencie F Civatte J Linear lichen nitidus Ann Dermatol Venereol 1989 116 814 5 Petrozzi JW Shmunes E Linear lichen nitidus Cutis 1970 6 1109 12

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