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From Phoenix5's Prostate Cancer Glossary
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perineural invasion

Abbreviations: PNI

Definition: Perineural invasion (or involvement) refers to the growth of tumor along the nerve branches present within theprostate. This path may act as a highway, allowing the tumor to escape outside the confines of the prostatic capsule.

For more information: See perineural


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Definitions are provided for education only and are not medical advice. Created exclusively for Phoenix5. © 2002 Phoenix5.