Learning module: Petechiae, purpura and vasculitis

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Goals and objectives

The purpose of this module is to help medical students develop a clinical approach to the initial evaluation and treatment of patients with petechiae and purpura.

After completing this module, the learner should be able to:
  • Identify and describe the morphology of petechiae and purpura.
  • Outline an initial diagnostic approach to petechiae or purpura.
  • Recognize patterns of petechiae that are concerning for life-threatening conditions.
  • Recognize palpable purpura as the hallmark lesion of leukocytoclastic vasculitis.
  • Determine when a dermatology referral for petechiae or purpura is indicated.

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