Synchronous Ewing sarcoma of the fibula with involvement of the orbit and abducens nerve palsy

Abstract

Simultaneous or synchronous Ewing sarcoma (ES) is the occurrence of multifocal lesions without pulmonary involvement. This is a very rare condition. We present a case of multifocal synchronous ES of the fibula with orbital involvement and adducens nerve palsy. A 17-year-old boy presented with pain and swelling in both legs for 6 weeks. He was unable to walk due to pain. He was pale and cachexic. There was proptosis and ptosis in the right eye. His investigations were consistent with a multifocal malignant tumor. There were lesions in the left fibula, tibia, right tibia, and right orbit. The histopathological diagnosis was Ewing sarcoma (ES). This is the first report of synchronous ES involving the orbit and abducens nerve.