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JID VisualDx Quiz: November 2014

      JID and Logical Images, Inc., have cooperated to offer the JID VisualDx Quiz, incorporating diagnostic images from VisualDx's vast database. Questions relate to the image as well as to selected articles in JID, which are listed after the questions. Answers will be posted as supplementary material. We hope you enjoy this challenge.
      Figure thumbnail fx1
      Image appears with permission from VisualDx. © Logical Images, Inc.

      QUESTIONS

      • 1.
        What is your diagnosis?
        • a.
          Phytophotodermatitis.
        • b.
          Polymorphous light eruption.
        • c.
          Fixed drug reaction.
        • d.
          Porphyria cutanea tarda.
        • e.
          Phototoxic reaction.
      • 2.
        In which of the following photoinduced conditions is UVB the wavelength implicated in disease development?
        • a.
          Erythropoietic protoporphyria.
        • b.
          Lupus.
        • c.
          Melanoma.
        • d.
          Phototoxic reactions.
        • e.
          Erythema ab igne.
      • 3.
        Intense intermittent exposure to sunlight is associated with which of the following?
        • a.
          Increased DNA damage in skin.
        • b.
          Increased urinary T-T dimers.
        • c.
          Reversal of vitamin D insufficiency.
        • d.
          Melanoma.
        • e.
          All of the above.

      TOPIC ARTICLE

      Questions 2 and 3 refer to the following article:
      Answers are available as supplementary material at http://dx.doi.org/10.1038/jid.2014.394.

      REFERENCES

        • Petersen B.
        • Wulf H.C.
        • Triguero-Mas M.
        • et al.
        Sun and ski holidays improve vitamin D status, but are associated with high levels of DNA damage.
        J Invest Dermatol. 2014; 134: 2806-2813