TNF and non-Hodgkin lymphoma: Another SNP (TNF- α rs1800630 minor allele A) was associated with an increased risk of NHL in the present study and this is consistent with the findings of the other two studies in Asia.[15, 16] The present study and the study by Gu [16] included Han Chinese only and found a 80% higher risk for NHL among TNF-α rs1800630 minor allele A carriers.