RESUMEN
Retinoblastoma is one of the most important childhood tumors with genetic implications and necessity for family counseling and long term follow up. We are presenting a 22 year-old Saudi male with history of bilateral retinoblastoma, who was initially treated by enucleation of his left eye. The histopathology showed a moderately differentiated tumor with vitreous seeding and he received chemotherapy in addition to radiotherapy to his right eye. He presented 20 years later with a right orbital tumor, frozen globe and proptosis. The excisional biopsy of his orbital mass revealed a spindle cell sarcoma with features of malignant fibrous histiocytoma. His clinical and radiological findings are presented together with the histopathologic features of his orbital tumor and brief review of secondary tumors in retinoblastoma patients