TNFSF13B and Ewing sarcoma: BAFF plasma levels were further examined in solid childhood malignancies such as nephroblastoma (Wilms tumor), Ewing sarcoma, and rhabdomyosarcoma showing BAFF levels of 2.757 ± 3.332 ng/mL, 4.311 ± 4.750 ng/mL, and 6.593 ± 4.502 ng/mL, respectively, and these levels were higher compared to the childhood non-Hodgkin's lymphoma subgroup (2.376 ± 1.560 ng/mL) [95].