in a review of 159 gallbladder carcinomas , we identified four unusual histologic types : oat-cell carcinoma ( five cases ) , giant-cell adenocarcinoma ( seven cases ) , intestinal-type adenocarcinoma ( three cases ) , and adenocarcinoma with choriocarcinoma-like areas ( one case ) .
C0001418
adenocarcinoma
C0008497
choriocarcinoma