Two cases of second tumor following treatment for retinoblastoma

A 6-month-old female infant was diagnosed with bilateral retinoblastoma. Her left eye was enucleated. The right eye cured after photocoagulation, chemotherapy and irradiation totalling 40 Gy. Malignant fibrous histiocytoma developed in the left antrum 13 years later. It was successfully treated by surgical removal and irradiation. Another 3-month-old male infant was diagnosed with bilatelral retinoblastoma. His left eye was enucleated. The right eye cured after photocoagulation, chemotherapy and irradiation totalling 38 Gy. Meningioma developed 11 years later and was successfully treated by surgery. There has been no recurrence in both cases. The second tumor in both cases developed in irradiated areas. There is a possibility that irradiation as well as genetic factors may have been involved in its occurrence. (author)