VDR and neoplasm: In contrast to the above study results, no significant relationship was found between VDR values and tumor stage or histological grade in a study conducted by Dai et al involving 2433 patients.[24] In another study involving 50 patients, no relationship was detected between VDR and tumor stage, lymphovascular invasion, or lymph node involvement.[28] The results of these last 2 studies are in line with our findings.