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Table 1 Laboratory tests confirming non-ketotic hypoinsulinemic hypoglycemia by IGF2 production

From: Seborrheic keratoses and severe hypoinsulinemic hypoglycemia associated with insulin grow factor 2 secretion by a malignant solitary fibrous tumor

Test

Result

Cut-off

Morning cortisol (nmol/L)

259.34

171.05–535.24

Potassium (mmol/L)

4.2

3.5–5.0

Glucose (mmol/l)

2.22

3.88–5.49

Thyrotropin (mU/L)

3.07

0.27–4.2

Free T4 thyroxine (nmol/L)

0.013

0.011–0.021

Insulin (pmol/L) in hypoglycemia (2.22 mmol/L)

<1.2

<18

Pro-insulin (pmol/L) in hypoglycemia (2.22 mmol/L)

1.56

<9.4

C Peptide (nmol/L) in hypoglycemia (2.22 mmol/L)

0.032

<0.198

β-hidroxybutyrate (µmol/L)

<9.98

<429.91

Cortisol (nmol/L) in hypoglycemia (1.6 mmol/L)

427.64

>496.62

GH (μg/L)

0.09

≤2.47

IGF-1 (μg/L)

32

55–166

IGF-2 (μg/L)

594

288–736

IGF-2/IGF-1 ratio

18.56

Up to 3