IFNA1 and neoplasm: A subset of ten genes, including CDKN2A, CDKN2B, IFNA1 and IFNE, were found within the same segment in all engrafting LUAD tumor regions and were significantly more likely to be lost homozygously in LUAD regions that formed PDX models compared to those that did not (p = 0.00022, Fisher’s exact test).