Prognostic and clinicopathological value of perineural invasion in colorectal cancer: a meta-analysis
Background Perineural invasion (PNI) is a pathological feature associated with aggressive tumor behavior in several solid malignancies. In colorectal cancer (CRC), PNI has been reported to correlate with poorer prognosis, as well as increased risks of postoperative recurrence and metastasis. However, the available evid...