What are these pIaques?
References
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Becker SW. Lichen spinulosus following intradermal application of diphtheria toxin. Arch Dermatol Syph 1930; 21:839-40.
Strickling WA, Norton SA. Spiny eruption on the neck. Diagnosis: lichen spinulosus (LS). Arch Dermatol 2000; 136: 1165-70.
Cohen SJ, Dicken CH. Generalized lichen spinulosus in an HIV positive man. J Am Acad Dermatol 1991; 25:116-8.
Kano Y, Orihara M, Yagita A, Shiohara T. Lichen spinulosus in a patient with Crohn's disease. Int J Dermatol 1995; 34: 670-1.
Maiocco KJ, Miller OF. Lichen spinulosus: response to therapy. Cutis 1976; 17: 294-9.