Symptomatic Hypoglycemia Related to Inappropriately High IGF-II Serum Levels in a Patient with Desmoplastic Small Round Cell Tumor

Table 1

Laboratory tests.

Test (unit)	Serum level	Reference
Cortisol (𝜇g/dL)	24	>18 if glucose <40
ACTH (pg/mL)	130	<46
Glucose (mg/dL)	7	70–100
Insulin (𝜇U/mL)	<2.5	To 25
C peptide(ng/mL)	0.6	0.4–3.6
TSH (𝜇U/mL)	3.22	0.4–4.50
T4 free (ng/dL)	1.16	0.7–1.50
GH (ng/mL)	4.2	>3.3 if glucose <40
IGF-I (ng/mL)	65	101–267
IGF-II (ng/mL)	1491	414–1248
IGF-II/IGF-I ratio	22.94	𝟑.𝟖±𝟏.𝟓