Every dermatologist in the course of his practice is confronted with sporadic cases of unusual dermatoses, among which are lichen nitidus and pityriasis lichenoides et varioliformis acuta (Habermann). Such cases, although infrequent, are not necessarily rare. However, to the best of my knowledge and as far as I could determine from the literature, the simultaneous occurrence of 2 cases of lichen nitidus and 2 cases of parapsoriasis varioliformis in separate pairs of siblings has not been reported. Such an occurrence is undoubtedly fortuitous, but inasmuch as the etiology of both of these conditions remains unknown, I felt that these phenomena were worthy of recording.
Report of Cases
Lichen Nitidus. Case 1.—
A 7-year-old Negro male child was first seen by me on July 29, 1960. He manifested a mildly pruritic eruption of 3 months' duration. Examination revealed an eruption consisting of numerous discrete glistening papules principally located on the elbows, knees,
GUIDUCCI AA. Lichen Nitidus and Pityriasis Lichenoides in Siblings. Arch Dermatol. 1962;85(6):748–750. doi:10.1001/archderm.1962.01590060058014
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