Table 1.

Patient characteristics

	Patient 1	Patient 2	Patient 3	Patient 4	Patient 5
Age, years	66	77	61	65	57
Sex	Male	Female	Male	Male	Female
Preoperative imaging	MRCP	PET/CT (non-contrast)	MRCP	Triphasic CT	MRCP
				MRCP	ERCP
Radiographic abnormality	Mildly dilated cystic duct stump	No suspicious findings	No suspicious findings	Minimal thickening of cystic stump	No suspicious findings
	Borderline enlarged lymph node			Sub-centimetre lesions in segments III and IV
Operation	Bile duct resection	Cystic duct excision	Cystic duct excision	Bile duct resection	Cystic duct excision
	Portal lymphadenectomy	Portal lymphadenectomy	CBD exploration with removal of stone	Portal lymphadenectomy
	Partial hepatectomy segments IV and V	Partial hepatectomy segments IV and V
Operative findings	Palpable mass at cystic duct remnant	None	CBD stone	Palpable mass at cystic duct remnant	None
	Enlarged portal lymph nodes			No liver lesions identified
Pathology	Cholangiocarcinoma (T2N1)	No evidence of malignancy or dysplasia	No evidence of malignancy or dysplasia	No evidence of malignancy or dysplasia	No evidence of malignancy or dysplasia
	4/6 nodes positive
Status	DoD: 15.3 months	NED: 0.9 months	NED: 16.0 months	NED: 25.6 months	NED: 2.1 months

MRCP, magnetic resonance cholangiopancreatography; PET, positron emission tomography; CT, computed tomography; ERCP, endoscopic retrograde cholangiopancreatography; CBD, common bile duct; DoD, died of disease; NED, no evidence of disease.