title: Atypical Presentation of Ewing's Sarcoma with a Single Left Orbital Metastasis.
abstract: BACKGROUND
  We present an uncommon case of Ewing's sarcoma in a 16-year-old boy.
  
  
  METHODS
  This case can be considered unique because of the atypical presentation, normal laboratory tests and absence of the typical symptoms such as pain, masses or swelling, fatigue or weight loss, breathing problems linked to lung metastases or pathologic fractures. The only event that brought the patient to our attention was the sudden onset of left proptosis.
  
  
  CONCLUSIONS
  The final histopathology together with CT and PET-CT findings led to the diagnosis of a multi-metastatic Ewing's sarcoma involving the orbit, skeleton, bone marrow and lymph nodes.
authors.affiliation: Department of Advanced Biomedical Sciences, University Federico II, Naples, Italy.
authors.forename: Marta
authors.initials: M
authors.lastname: Puglia
authors.affiliation: Department of Advanced Biomedical Sciences, University Federico II, Naples, Italy.
authors.forename: Alessandra
authors.initials: A
authors.lastname: Acquaviva
authors.affiliation: Department of Advanced Biomedical Sciences, University Federico II, Naples, Italy.
authors.forename: Andrea
authors.initials: A
authors.lastname: Ponsiglione
authors.affiliation: Department of Advanced Biomedical Sciences, University Federico II, Naples, Italy.
authors.forename: Luigi
authors.initials: L
authors.lastname: Barbuto
authors.affiliation: Department of Advanced Biomedical Sciences, University Federico II, Naples, Italy.
authors.forename: Nilde
authors.initials: N
authors.lastname: Di Paolo
authors.affiliation: Department of Advanced Biomedical Sciences, University Federico II, Naples, Italy.
authors.forename: Dario
authors.initials: D
authors.lastname: De Rosa
authors.affiliation: Department of Advanced Biomedical Sciences, University Federico II, Naples, Italy.
authors.forename: Simonetta
authors.initials: S
authors.lastname: Sicuranza
authors.affiliation: Department of Advanced Biomedical Sciences, University Federico II, Naples, Italy.
authors.forename: Simone
authors.initials: S
authors.lastname: Maurea
authors.affiliation: Department of Advanced Biomedical Sciences, University Federico II, Naples, Italy.
authors.forename: Massimo
authors.initials: M
authors.lastname: Imbriaco
keywords: Exophthalmos; Neoplasm Metastasis; Neuroectodermal Tumors; Sarcoma, Ewing