perineural infiltration

per·i·neu·ral in·fil·tra·tion

infiltration adjacent to or along a nerve.
References in periodicals archive ?
Nerve twigs within the biopsy specimen (figure 2, B) indicated perineural infiltration by the tumor.
4,10,23] Previous studies have shown an increase in the number and diameter of the pancreatic nerve fibers in CP,[2] as well as perineural infiltration by T lymphocytes, suggesting a cell-mediated cytotoxic mechanism for the neural alteration.
Significant islet cell hyperplasia and single-cell fibrous tissue permeation with perineural infiltration were seen in 2 of the CP cases we reviewed.