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To the Editor.—
In his article in the July 1981 Archives (117:415) on the Koebner phenomenon, Waisman states that an "essential feature of the reaction is . . . that the isomorphic response evolves in a patient with psoriasis when the disease is in a reactive phase,. . . or on the `upswing.' "It may be true that patients in the acute state are more susceptible to having the Koebner reaction develop, but, in our experience, most cases occur in chronic, stable, plaque-type psoriasis.
Garcia RL. The Koebner Phenomenon. Arch Dermatol. 1982;118(5):292. doi:10.1001/archderm.1982.01650170006009
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