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herald patch

1) Etiology: - pityriasis rosea Clinical manifestations: - solitary erythematous macule 2-10 cm in diameter - appears prior to more skin lesions appearing on the torso & extremities Differential diagnosis: - erythema migrans of Lyme disease

General

macule

References

  1. Grim L 12 Rashes You Need to Know: Common Dermatologic Diagnoses Medscape. Feb 10, 2021 https://reference.medscape.com/slideshow/skin-rashes-6004772
  2. NEJM Knowledge+ Dermatology