Extracranial metastasis in histologically benign meningiomas: unpredictable behavior in WHO grade 1 tumors. Illustrative cases.

Key Points

• This research examines the unexpected occurrence of extracranial metastasis in benign meningiomas classified as WHO grade 1.
• Presentation of illustrative cases of meningiomas with benign histology
• Analysis of recurrent and atypical tumor presentations
• Discussion of clinician awareness and diagnostic strategies
• Cases demonstrate systemic lesions despite benign histology
• Emphasis on the need for heightened suspicion in atypical presentations
• Highlighting a paradox in the expected behavior of WHO grade 1 tumors