MRI of the lumbar spine a 60-year-old woman with advanced breast cancer and known skeletal metastases showed secondary neoplastic lesions in multiple locations:
- bone metastasis of the os sacrum invading the sacral canal (extradural)
- large metastasis of the conus medullaris (intradural-intramedullary)
- multiple nodular metastases of the cauda equina (intradural-leptomeningeal)