Analysis of 777 cases with obstruction of the ureter or extrahepatic bile duct by ultrasonography after normal saline retention enema

The Ultrasound Journal

Table 4 Location and nature of obstructive lesions in group B and the results from follow-up.

Location	Calculi detected by enema diagnosis	Calculi verified by other methods			Tumors detected by enema diagnosis	Tumors verified surgically
		Shown by ERCP and lith extraction	Surgical verification	Total
Behind the transverse colon	69	16	53	69	25	25
Behind the hepatic flexure of the colon or ascending colon	60	14	46	60	8	8
Total	129	30	99	129	33	33

All of the pathological results of the tumors from surgical therapy are adenocarcinoma. ERCP, endoscopic retrograde cholangiopancreatography.