Table 2 Distribution of the cases according to Papanicolaou Society of Cytopathology for Pancreatobiliary System (PSC-PS)
PSC-PS category | n:162 | Biopsy or surgery procedure (n:26) | Concordance with definite histopathological or clinical diagnosis |
|---|---|---|---|
I (non-diagnostic) | 34(20%) | 9 | 21 malignant, 13 benign |
II (benign) | 30(18.5%) | 3 | 93.3% (3 of them false negative) |
III (atypical) | 18(11%) | 4 | 94.4% (1 of them false positive) |
IVa (neoplastic: benign) | 3(0.18%) | 0 | %100 |
IVb (neoplastic: other) | 10(0.61) | 4 | 80% (3 of them had true positive but not concordant) * |
V (suspicious for malignancy) | 11(0.67%) | 2 | %100 |
VI (malignant) | 56(34.5%) | 4 | %100 |