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Congenital ulcer: what do you think?
  1. Marjorie Uber1,
  2. Renata Robl1,
  3. Vânia Oliveira Carvalho1,
  4. Kerstin Taniguchi Abagge1,
  5. Betina Werner2,
  6. Leide Parolin Marinoni1
  1. 1Departament of Pediatric Dermatology, Hospital de Clínicas, Universidade Federal do Paraná, Curitiba, Paraná, Brazil
  2. 2Departament of Pathology, Hospital de Clínicas, Universidade Federal do Paraná, Curitiba, Brazil
  1. Correspondence to Marjorie Uber, Rua Manoel Eufrásio, 403, apto 121. Juvevê, Curitiba, Paraná CEP 80.030-440, Brazil; marjorieu{at}gmail.com

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A 19-day-old boy presented an ulcer with erythematous and elevated borders in the superior back (figure 1). The lesion was present at birth and the boy was otherwise healthy. The diagnostic hypothesis included xanthogranuloma, Langerhans cell histiocitosis, mastocytoma, leukaemia cutis and congenital infections. A punch biopsy was performed and the microscopic analysis revealed a dermal–epidermal infiltrate of numerous histiocytes, …

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