We next aligned the scDNA-seq data to a custom reference covering the breakpoint (“Methods”) and only found cancer reads mapping to the fusion breakpoint (P=0.032, two-sided Fisher’s exact test), while a mixture of reads from cancer and non-cancer cells mapped to wt IGF2BP2 and wt TESPA1 (P = 0.78 and P = 1.00, respectively, two-sided Fisher’s exact test) (Fig. 6c). The gene discussed is IGF2BP2; the disease is cancer.