From: Cytokeratin 20 (CK20) and apomucin 1 (MUC1) expression in ampullary carcinoma: Correlation with tumor progression and prognosis
O-type(No. of cases)
MUC5AC +/MUC6 +
MUC5AC -/MUC6 -
(N = 9)
(N = 8)
T-stage
   I
3
1
   II
5
   III
4
   IV
0
Nodal metastasis
   Negative
   Positive