Abstract
Ewing's sarcoma is a rare and aggressive tumor which classified as peripheral primitive neuroectodermal tumor. It commonly arises in the long bones of the extremities and rarely in the head and neck region. Localization of the sinonasal tract is a rare occurrence thus the number of clinical studies published in the literature are limited. The diagnosis of this tumor requires a histopathological examination, immunohistochemistry and cytogenetic analysis. Ewing's sarcomas are characterized by a CD99 positivity in immunohistochemistry stain and a t(11:22)(q24:q12) translocation in cytogenetic study. The treatment of choice is the multimodality treatment including surgery, radiotherapy and chemotherapy. This is a case report of sinonasal and orbital Ewing's sarcoma in a 24-year-old male patient who presented with a history of right nasal obstruction, right eye pain and periorbital edema.