KMT2A and neoplasm: All animals that had undergone surgery (vehicle or tumor cell injection) had lost weight at day 10 compared to day 0, which was not seen in treatment naïve animals (relative weight at day 10 to day 0, mean ± SEM: Naïve; 0.98 ± 0.01, Vehicle; 0.95 ± 0.01, G-tumors; 0.92 ± 0.01, small MLL-tumors; 0.93 ± 0.01, large MLL-tumors; 0.93 ± 0.01), showing that handling and surgery per se resulted in animal weight reduction.