Hypoglycemic Syndrome in a Patient with Proinsulin-Only Secreting Pancreatic Adenoma (Proinsulinoma)

Table 2

Results of the venous sampling during selective angiography (Imamura test). Normal range for insulin concentration was 43–210 pmol/L (6.0–29.1 mU/L) and for proinsulin concentration was <1.1 pmol/L (10 pg/mL).

		Time after Ca^2+-gluconate bolus
Artery	Analyte	0′	30′	60′	120′
Splenic	Insulin, pmol/L (mU/L)	55 (7.6)	55 (7.6)	62 (8.6)	67 (9.3)
	Proinsulin, pmol/L (pg/mL)	20 (185)	20 (176)	14 (131)	20 (176)
	Glucose, mmol/L (mg/dL)	3.0 (54)	3.1 (55)	2.8 (51)	2.9 (53)
Distal splenic	Insulin	43 (6.0)	32 (4.4)	46 (6.4)	65 (9.0)
	Proinsulin	18 (155)	16 (145)	15 (132)	27 (234)
	Glucose	3.0 (54)	2.4 (43)	2.7 (49)	3.3 (60)
Superior mesenteric	Insulin	32 (4.5)	<14 (2.0)	60 (8.3)	43 (6.0)
	Proinsulin	19 (166)	22 (192)	22 (196)	24 (212)
	Glucose	2.6 (47)	2.1 (37)	3.1 (55)	3.3 (60)
Gastroduodenal	Insulin	53 (7.4)	37 (5.1)	38 (5.3)	42 (5.8)
	Proinsulin	19 (166)	20 (179)	18 (163)	18 (155)
	Glucose	2.6 (47)	2.8 (50)	3.2 (58)	3.1 (56)