Open access: https://ina-jns.org/ Introduction: Breast cancer is the second most common primary tumor with brain metastases. Breast cancer metastasizing to the neurocranium can include the skull, dura, or parenchyma of the brain. Skull metastases were most often found in the breast, typically presenting as osteolytic. Case Presentation: A 53-year-old woman with a history of breast cancer surgery 8.5 years before she had a headache , nausea, and right visual disturbance. Neuroimaging studies

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... identified a large tumor in the anterior part of the right middle cranial fossa associated with severe hyperostosis of the underlying bones. Intraoperative exposure revealed that the primary tumor site was dura mater of the middle cranial fossa. The tumor has been histologically diagnosed as metastatic breast carcinoma with sphenoid bone invasion. Conclusion: Dural breast cancer metastasis may pose this uncommon characteristic of severe hyperostosis, which should be considered in primary skull tumor differential diagnosis.