What are these pIaques?

Friedman SJ. Lichen spinulosus. Clinicopathologic review of thirty-five cases. J Am Acad Dermatol 1990; 22: 261-4.

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.