7 Liang Liang Z Z Zeng Zeng X X Gao Gao J J Wu Wu S S Analysis of EGFR, HER2, and TOP2A gene status and chromosomal polysomy in gastric adenocarcinoma from Chinese patients Analysis of EGFR, HER2, and TOP2A gene status and chromosomal polysomy in gastric adenocarcinoma from Chinese patients BMC Cancer. The gene discussed is EGFR; the disease is cancer.