Endoscopic ultrasonography in patients with elevated carbohydrate antigen 19-9 of obscure origin

Table 1 Summary of demographic and laboratory data and endoscopic ultrasonography findings in 17 patients with elevated serum carbohydrate antigen 19-9 values

Case	Gender	Age, yr	EUS findings				CA 19-9 level, IU/mL		Time to CA 19-9 normalization, mo	UDCA administration	Duration of UDCA administration, mo	Other findings	Follow-up duration, mo
			CBD size, mm	PD size, mm	GB sludge	CBD sludge	First visit	Last visit
1	F	28	3	1	Yes	Yes	78.3	20.7	3	Yes	3		6
2	F	51	2	1	Yes	Yes	187.9	25.6	4	Yes	6		17
3	F	51	3	1	Yes	Yes	63.6	30.2	4	Yes	6	GB polyp	8
4	F	36	5	0.5	Yes	No	46.1	21.3	5	Yes	3		36
5	M	68	3	1	Yes	No	73.3	20.6	7	Yes	3		7
6	M	38	2	0.5	Yes	No	165.3	16	8	Yes	6		16
7	F	63	8	1	Yes	No	48.2	61.1		Yes	3		51
8	F	59	4	1	Yes	No	46.2	40.4		Yes	18		20
9	F	71	5	2	Yes	No	43.9	57.3		Yes	10		10
10	M	43	2	1	Yes	No	162.7	123.9		Yes	15		17
11	F	64	5	1	Yes	No	141.8	122.2		Yes	12	GB polyp	14
12	F	36	4	1	Yes	No	87.6	-		Yes	3		3
13	M	46	3	2	Yes	No	381	19.4	5	No			5
14	F	30	4	2	Yes	No	64.1	50.4		No			3
15	F	55	3	1	Yes	No	51.4	54.1		No			29
16	F	40	4	1	Yes	No	40	43.9		No			12
17	F	85	6	1	No	No	40.3	-		No		GB polyp, Pancreatic cyst	3

CBD: Common bile duct; PD: Pancreatic duct; GB: Gallbladder; UDCA: Ursodeoxycholic acid.