THE MERCK MANUAL: The Merck Manual of Diagnosis and Therapymultimedia

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  • Mastocytosis
  • Urticaria Pigmentosa

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    Urticaria Pigmentosa

    Lesions consist of reddish brown, irregular plaques that urticate when rubbed (Darier sign).

    By permission of the publisher. From Joe E, Soter N. In Current Dermatologic Diagnosis and Treatment, edited by I Freedberg, IM Freedberg, and MR Sanchez. Philadelphia, Current Medicine, 2001.