A case of delayed radiation necrosis occurred 16 years after the treatment of medulloblastoma

Abstract

We report a case of delayed radiation necrosis of the cerebellum that occurred 16 years after the treatment of medulloblastoma. A 24-year-old male who had a history of radiotherapy for medulloblastoma when he was 8 years old, visited our hospital because of mild ataxia. MRI revealed a 1 cm-size Gd-enhanced lesion in the right middle cerebellar peduncle. Open biopsy was performed, and the lesion was diagnosed as radiation necrosis. When a new lesion appears during a long-term follow-up after treatment for medulloblastoma, the possibility of radiation necrosis should be reminded.