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IGF-I, Pediatric

Item Value
Approval req'd? Yes, contact Chemistry/Immunology Resident at 415-353-1438. for patients > 20 years old.
Available Stat? No
Test code PIGF1
Test group IGF1
Performed by Esoterix
Sendout? Yes
Method Blocking RIA after acid:alcohol extraction
Container type Gold top
Amount to Collect 2 mL blood
Sample type Serum
Preferred volume 1 mL serum
Min. Volume 0.1 mL serum
Processing notes Aliquot serum and freeze. Ship frozen to China Basin
Units ng/mL
Normal range Newborns and Infants
Age Term (ng/mL) Preterm (ng/mL)
Birth 15-109 21-93
1 day-2 months 15-109 23-163
3-4 months 7-124 23-171
5-6 months 7-93 15-132
7-12 months 15-101 15-179


Children
Age Male Range (ng/mL) Female Range (ng/mL)
1-2 years 30-122 56-144



Male Pubertal Ranges by Tanner Stage
Age Tanner 1 (ng/mL) Tanner 2 & 3 (ng/mL) Tanner 4 & 5 (ng/mL)
3 years 20-141
4 years 25-157
5 years 30-174
6 years 37-192
7 years 44-211
8 years 52-231 39-264
9 years 61-252 52-304
10 years 71-275 67-347
11 years 82-299 86-393 277-673
12 years 93-324 106-443 265-652
13 years 106-350 130-497 241-612
14 years 120-377 156-554 220-574
15 years 127-391 185-616 199-537
16 years 201-648 180-501
17 years 161-467
18 years 144-434


Female Pubertal ranges by Tanner Stage
Age Tanner 1 ng/mL) Tanner 2 (ng/mL) Tanner 3 (ng/mL) Tanner 4 & 5 (ng/mL)
3 years 26-162
4 years 32-179
5 years 39-198
6 years 47-217
7 years 55-238
8 years 64-259 89-369
9 years 74-282 96-399 192-568
10 years 85-306 104-431 192-568 279-664
11 years 97-332 112-466 192-568 268-646
12 years 110-358 121-504 192-568 248-612
13 years 131-545 192-568 229-579
14 years 136-566 192-568 211-547
15 years 192-568 194-516
16 years 177-487
17 years 162-458
18 years 147-430


Adults
Age Male (ng/mL) Female (ng/mL)
19-20 years 281-510 217-475
21-30 years 155-432 87-368
31-40 years 132-333 106-368
41-50 years 121-237 118-298
51-60 years 68-245 53-287
61-70 years 60-220 75-263
71-80 years 36-215 54-205

Synonyms Somatomedin C; IGF-1 ultrasensitive
Turn around times Test performed Monday-Saturday. Turnaround time: 3-5 days.
Additional information This send-out assay is primarily reserved for testing in pediatric patients with suspected or complex endocrine abnormalities. For adult patients see "IGF-I" (test code IGF1). It requires approval if ordered in patients over the age of 20
LOINC code 2484-4
Last Updated 5/13/2013 8:43:38 AM
Entry Number 1034
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