FGFR4 and lymphangioma: Compared with the mutated genes identified in the pBC (Figure 5A), ESR1, ARID2, BLM, FGFR4, APC, ERBB2, ROS1, ATR, IGF1R, NF1, JAK1, FAT1, NOTCH2, and AKT1 mutation frequencies were significantly different in LM.