Diagnosis of Distal Cholangiocarcinoma after the Removal of Choledocholithiasis

Table 4

Endoscopic retrograde cholangiopancreatography findings.

	Group A	Group B	𝑃 value
	𝑛=9	𝑛=37
Diameter of the common bile duct	9.7 ± 2.1	13.0 ± 4.7	0.043
Morphology of the bile duct			0.061
Normal or mild irregularity	3	5
Unilateral narrowing	5	12
Bilateral narrowing	1	20