THE MERCK MANUAL: The Merck Manual of Diagnosis and Therapymultimedia

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Immunology; Allergic Disorders

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Urticaria Pigmentosa

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Urticaria Pigmentosa

Topics Containing This Multimedia

  • Mastocytosis
  • Lesions consist of reddish brown, irregular plaques that urticate when rubbed (Darier's 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. Available at www.images.md.

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