While RFC1 protein expression did not correlate with SLC19A1 methylation across all evaluable tumor samples (n = 24, r = −0.009, P = 0.97), there was a trend towards change in RFC1 protein expression varying inversely with change in SLC19A1 methylation for patients in who both pre- and post-decitabine tumor samples were evaluable (n = 10, r = −0.45, P = 0.1912). Here, RFC1 is linked to neoplasm.