The Daily PANCE and PANRE Question 20

This papulosquamous eruption is most common in young adults. A single oval patch is generally noted several days before a more generalized, fawn-colored rash erupts. This rash is most prevalent on the trunk, and the proximal upper and lower extremities. The rash spontaneously disappears over 5 to 6 weeks. The diagnosis is:

  1. pityriasis rosea
  2. tinea corporis
  3. psoriasis
  4. atopic dermatitis
  5. sporotrichosis

Answer: A

Pityriasis rosea

This is the classic presentation of pityriasis rosea. Remember that the differential diagnosis includes secondary syphilis, so if there is a positive sexual history - consider ordering a VDRL/RPR. The "herald" patch which is described is pathognomonic for pityriasis.

Know Your Content Blueprint

Pityriasis rosea is covered as part of the NCCPA™  Dermatology Content Blueprint (5%)

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Pityriasis rosea

An 8-month old, well-appearing male with a one-week history of rash on trunk; minimal pruritus; faint scaling and recent history of viral illness (watch video)
Review topic and view this ReelDx video case: pityriasis rosea (ReelDx)

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