Successful Treatment of Late Isolated Bone Metastasis in a Patient with Bilateral Retinoblastoma Using an Unconventional Method.

Though survival in bilateral retinoblastoma (RB) has improved due to advancement in diagnostics and treatment modalities, children require long-term follow-ups for recurrence and second malignancies. We report a case of bilateral RB in a 7-month-old baby who was treated with chemotherapy, transpupillary thermotherapy, and periocular carboplatin for both eyes following which there was complete regression of tumour. Six and a half years after treatment, the child presented with metastatic recurrence of tumour in the left ulna. He was treated successfully with chemotherapy, extracorporeal radiation and reimplantation therapy. A less aggressive treatment approach for isolated bone relapse may be considered in selected cases.