However, in contrast to the data of Novak et al. indicating that BAFF expression levels correlate with disease severity [15], our data show no significant variation in levels of BAFF expression with tumor grade and growth pattern and no association of levels of BAFF-R expression with histologic grade and growth pattern, even though the vast majority of patients with FL were BAFF-R positive. The gene discussed is TNFSF13B; the disease is neoplasm.