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February 1965

Grenz Rays and Lichen Planus: Report of a Case of Isomorphic Phenomenon Following Grenz Ray Therapy

Author Affiliations


From the Newark Beth Israel Hospital, Assistant Attending Dermatologist (Dr. Brodkin), Attending Dermatologist (Dr. Bleiberg).

Arch Dermatol. 1965;91(2):149-150. doi:10.1001/archderm.1965.01600080057010

A case is reported of acute eruptive lichen planus in which grenz rays were used on two areas as a part of the treatment. It was observed that in the two areas given 400 r of grenz rays over a four-week period, an intense isomorphic phenomenon occurred with confluence of the eruption. This, however, did not persist much beyond the generalized eruption after the grenz rays were stopped. Although grenz rays are frequently suggested for the treatment of lichen planus, it should be kept in mind that this type of radiation is capable of producing an isomorphic phenomenon in this disease, particularly the acute generalized type.

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