The logistic regression model for predicting NSLN metastasis is as follows: logit (p) = −2.853 + 1.592∗ positive expression of MMP15 in cytoplasm + 3.712∗ neural invasion + 0.898∗ lymphovascular invasion + 0.641∗ tumor size + 0.904∗ the number of positive SLNs. This evidence concerns the gene MMP15 and neoplasm.