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Acute erythematous eruptions: what is the diagnosis?
  1. Renata Robl,
  2. Marjorie Uber,
  3. Mayara Schulze Cosechen Rosvailer,
  4. Susana Giraldi,
  5. Vânia Oliveira Carvalho
  1. Division of Pediatric Dermatology, Federal University of Paraná, Hospital de Clínicas da UFPR, Curitiba, Paraná, Brazil
  1. Correspondence to Dr Renata Robl, Rua Cruz e Souza 68, Guabirotuba, Curitiba, Paraná, CEP 81510160, Brazil; natarobl{at}hotmail.com

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Select one best answer from the following:

  1. Drug reaction

  2. Annular erythema of infancy

  3. Urticaria

  4. Urticaria vasculitis

  5. Discoid lupus

  6. Erythema infectiosum

Answers to the following questions can be found on page ▪▪▪

Question 1

Case 1: A 9-year-old boy presents with a 2-day history of a maculopapular eruption, with lesions converging to reddish plaques on the malar eminences, sparing the perioral region, forehead and nose (figure 1A). The lesions were exacerbated by exposure to sun and heat. Four days later, a lacy rash appeared on the trunk, limbs and buttocks, not sparing palms and soles (figure 1B). His parents denied any prior use of medication. No fever, arthralgias and/or arthritis was present.

Figure 1

Reddish plaques on the malar eminences and trunk (A) and in arms (B) with a lacy appearance.

Question 2

Case 2: A 3-year-old boy presents with a personal history of allergic rhinitis and a family history of atopy (mother with atopic dermatitis). About 24 h ago, his parents noticed a maculopapular rash on his trunk and limbs, which had a burning sensation and a slight itch. The lesions were well circumscribed, blanching, erythematous plaques with pale centres, fleeting nature, with the skin returning to its normal appearance in 24 h (figure 2). He had low fever and a coryza 2 days before the onset …

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