Two Cases of Small Cell Carcinoma of the Gallbladder

Table 1

Immunohistochemical stains	Tumor response to stain
Synaptophysin	Positive
Chromogranin	Positive
CD56	Positive
CD57	Positive
Cytokeratin AE1/AE3	Negative
TTF1	Negative
CD45	Negative
Ki-67	Positive (>90% Tumor cells)