Table 2.

Pathology data in 139 patients with curative intent surgery for perihilar cholangiocarcinomas.

Parameter
Tumor diameter†, cm	2.5 (0.4–10)
Histology, adenocarcinoma	136 patients (97.8%)
Grade of differentiation
G1	82 patients (59%)
G2	42 patients (30.2%)
G3	15 patients (10.8%)
Tumor pattern type
Infiltrative	72 patients (51.8%)
Nodular	60 patients (43.2%)
Papillary	7 patients (5%)
pT stage
T1	21 patients (15.1%)
T2	40 patients (28.8%)
T3	56 patients (40.3%)
T4	22 patients (15.8%)
Lymph node metastases (pN1)	54 patients (38.8%)
Distant metastases∗ (pM1)	9 patients (6.5%)
Perineural invasion	49 patients (35.2%)
Negative resection margins	105 patients (75.5%)

^†Median value. ^∗Liver metastases (8 patients) and celiac trunk lymph node metastasis (1 patient).