Abstract
We reviewed clinicopathologic features and treatment outcomes in seven patients diagnosed with Stage 4/Group IV orbital sarcoma and treated on IRSG protocols I-III. Three patients had embryonal rhabdomyosarcoma (RMS), and two patients each had alveolar RMS or unclassified sarcoma. Median age at diagnosis was 1.8 years (range 0.2-6.9 years). All patients had bone marrow involvement, including six with normal complete blood count at diagnosis. Cerebrospinal fluid was normal in six patients. Three patients survived >5 years, including one with local recurrence. In conclusion, further study is needed to determine necessity of bone marrow and CSF examination in orbital sarcoma patients.