MKI67 and neoplasm: [90] In another study, a higher expression of the nonproliferative genes KRAS, CUL2, FAM13A, ADCK2, and LILRA2 was significantly associated with tumor shrinkage, and KRAS, MMS19, and IVD were related to a lower PEPI score (≤3) and, again, this gene expression had no correlation with Ki67 reduction [91].