MRI clues for perineural and leptomeningeal tumor spread

Contrast-enhanced MRI is highly sensitive for detecting perineural and leptomeningeal tumor spread. This video with Dr. Katie Bailey shows key imaging features and differences, using case examples.

• Educational video aimed at radiologists and trainees, reviewing how to distinguish perineural tumor (invading along perineurium) from leptomeningeal disease (coating pia/arachnoid) on MRI.
• Demonstrates typical appearances: leptomeningeal disease shows surface coating with abnormal FLAIR, while perineural tumor spreads along nerve sheaths, both best seen on post-contrast sequences.
• No external validation or original research; a teaching resource based on case examples.

Automated summary

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