What causes perineural invasion?
What causes perineural invasion? Rationale: perineural invasion is an under-recognized way of metastatic spread via tumoral invasion of the nerves. It is encountered in malignancies located in the head and neck but also in cancers involving the pancreas, colon and rectum, prostate, biliary tract and stomach. What is perineural invasion cancer? Perineural invasion (PNI) is […]