Bardach H
J Cutan Pathol. 1981 Apr;8(2):111-6. doi: 10.1111/j.1600-0560.1981.tb00994.x.
A skin biopsy from an 8-year-old boy with generalized lichen nitidus revealed a transepidermal perforating lesion never observed before in this disorder. A disturbance in dermo-epidermal interaction with alterations of epidermal cell kinetics could explain this finding in a disease which, curiously, shows many histologic features conducive to transepidermal perforation. A clear distinction should be made between primary and secondary perforating dermatoses, since perforation per se is a non-specific cutaneous reaction pattern occurring in the course of many unrelated disorders.