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January 11, 1902


JAMA. 1902;XXXVIII(2):93-98. doi:10.1001/jama.1902.62480020023001g

There are a number of names for this affection: Lichen simplex chronicus circumscriptus; lichen verrucosus, lichen corneus, etc., most of which are appropriate to this morbid process. In the last two decades it has been the subject of lively discussion, inasmuch as some cases of this description do not yield to the administration of arsenic, others do not show any typical lichen papules, but only the verrucous patches are characteristic of this disease and hence there arises serious doubt whether in these cases we have really to deal with a true lichen-planus process or with an atypical form of mycosis fungoides—A. Neiser, Deutscher Dermatologen Congress, 1894—or with a lichenization of a localized pruritus in the sense of Brocq. Thus further, Kaposi has named cases of this appearance keratosis verrucosa papillaris.

Now, this question as to the identity of these with lichen planus has lately been answered in the affirmative, after

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