Preoperative evaluation with T-staging system for hilar cholangiocarcinoma

Table 2 Resectability, incidence of margins negative and metastatic disease after staging by T stage

T Stage	Operative modus			Margins		Metastatic disease
	Resected	Drainage	Biopsy	Negative	Positive	Negative	Positive
T1 (n = 39)	29 (74.4)	8 (20.5)	2 (5.1)	22 (75.9)	7 (24.1)	24 (61.5)	15 (38.5)
T2 (n = 15)	9 (60.0)	4 (26.7)	2 (13.3)	3 (33.3)	6 (66.7)	7 (46.7)	8 (53.3)
T3 (n = 31)	2 (6.5)	15 (48.4)	14 (45.1)	0 (0)	2 (100)	9 (30.0)	22 (70.0)
χ2 value	35.5			8.8		7.3
P value	0.000			0.012		0.026

The percentages indicate the proportion of patients within each stage grouping or of the total number of patients. Metastatic disease refers to metastases to N2-level lymph nodes or to distant sites. Median survival was calculated for all patients, including those who died perioperatively.