From: Cytokeratin 20 (CK20) and apomucin 1 (MUC1) expression in ampullary carcinoma: Correlation with tumor progression and prognosis
Immunohistochemical classification
I-type
PB-type
O-type
Histological classification
Intestinal type
10
0
6
Pancreatobiliary type
13
5
Unusual type
1
2