NFIB and leukemia: In the p53m/m, nf1b−/−, nf1a+/+, suz12-mutant population, 22 of the 24 tumor-bearing fish (91.7%) had MPNSTs, five displayed leukemia (20.8%), and a single fish showed soft tissue sarcoma or adenosarcoma (4.2%) (Table S2).