title: Contribution of magnetic resonance imaging in the diagnosis of talus skip metastases of Ewing's sarcoma of the calcaneus in a child: a case report.
abstract: BACKGROUND
  Ewing's sarcoma of the calcaneus is rare. About thirty cases with calcaneus involvement have been reported in the literature. Talus skip metastases have rarely been described in the available literature
  
  
  METHODS
  We report a case of a 14-year-old Moroccan boy, who presented with Ewing's sarcoma of his right calcaneus, diagnosed by swelling of the calcaneus evolving over a year. Radiography, computed tomography and magnetic resonance imaging showed an important tumoral process of the calcaneus and talus skip metastases. The diagnosis was confirmed with histology after a biopsy. In spite of amputation and postoperative chemotherapy, our patient died six months later due to secondary respiratory distress after lung metastasis.
  
  
  CONCLUSIONS
  Imaging, especially magnetic resonance, is important in the diagnosis of Ewing sarcoma and skeletal skip metastases. Treatment of Ewing's sarcoma consists of chemotherapy, radiation therapy and surgical resection depending on the stage and extent of the disease. With the exception of lesions in the calcaneus, the prognosis for disease-free survival of Ewing's sarcoma of the foot is excellent.
authors.affiliation: Department of Radiology, Ibn Tofail Hospital, Gueliz, Marrakesh, 40000, Morocco. jhicham2000@hotmail.com.
authors.forename: Hicham
authors.initials: H
authors.lastname: Jalal
authors.forename: Zoubida
authors.initials: Z
authors.lastname: Belhadj
authors.forename: Hind
authors.initials: H
authors.lastname: Enneddam
authors.forename: Mohammed
authors.initials: M
authors.lastname: Madhar
authors.forename: Tarik
authors.initials: T
authors.lastname: Fikry
authors.forename: Omar
authors.initials: O
authors.lastname: Essadki
authors.forename: Ahmed
authors.initials: A
authors.lastname: Ousehal