ERBB2 and gallbladder adenocarcinoma: SNU-2773 cell line was derived from a metastatic neck lymph node of a 50-year-old male Asian patient (patient B; Table 1) with gallbladder adenocarcinoma harboring a HER2 gene amplification with a HER2/CEP17 ratio of 2.67 by FISH and protein overexpression of 3+ by IHC.