| • | vs.pemphigus vegetans (distribution = intertriginous) |
| • | pathogenesis – appears to be an allergic phenomenon |
| • | once sensitized, eruption can occur within a few days of re-administration |
| • | good response to corticosteroids |
Iododerma:
| • | begins as a rule with multiple pustules that rapidly coalesce into vegetating plaques (often ulcerate) |
| • | frequently associated with severe systemic symptoms |
| • | iodine containing compounds: IV pyelogram, urography, lymphography |
Fluoroderma:
| • | described after the frequent application of a fluoride gel to the teeth for the purpose of preventing caries during ionizing radiation to the face |
| • | scattered papules and nodules on the neck and on the preauricular region |
Bromoderma:
| • | distribution = lower extremities |
| • | vegetating, papillomatous plaques with pustules at the periphery |
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