Fig. 2

Macro and microscopic findings of the gallbladder. Gallbladder tumor with stone (a) and hepatic hilar lymph nodes (b). The tumor consists of well to moderately differentiated tubular adenocarcinoma (hematoxylin and eosin (H&E) stain, c ×200 and d ×400). The tumor cells in the gallbladder are slightly positive for e synaptophysin (×400) and f CD56 (×400), but negative for g chromogranin A (×400)