IGF2 - Laboratory Test Directory

Test Name Alias

LAB1231214 | Quest: 92790 | IGF2 | Insulin Like Growth Factor 2, Somatomedin A,

Interface Order Alias

1231959

Clinical Information

IGF-2 - IGF-2 measurements are useful in the diagnosis of growth disorders, as an adjunct to IGF-1.

Specimen Requirements

Specimen Collection Criteria

Collect (preferred specimen): One Gold-top SST tube.
Also acceptable: One plain Red-top tube.

Physician Office/Draw Specimen Preparation

Let specimen clot 30-60 minutes then centrifuge to separate serum from cells. Transfer serum to plastic transport tube and maintain at room temperature (20-26°C or 68-78.8°F) prior to transport

In-Lab Processing

Let specimen clot 30-60 minutes then centrifuge to separate serum from cells. Transfer serum to plastic transport tube and maintain at room temperature (20-26°C or 68-78.8°F) prior to transport.

Specimen Transport Temperature

Transport: 0.5 mL serum, room temperature (20-26°C or 68-78.8°F) . (Minimum: 0.3 mL)

Rejection Criteria

Hemolyzed specimens.
Grossly lipemic
Plasma
Specimens not collected and processed as indicated

Specimen Stability

Specimen Stability for Testing:

Room Temperature (20-26°C or 68-78.8°F): 7 days
Refrigerated (2-8°C or 36-46°F): 7 days
Frozen -20° C: 21 days
Frozen -70° C: 34 days

Specimen Storage in Department Prior to Disposal:

Specimen retention time is determined by the policy of the reference laboratory. Contact the Send Outs Laboratory with any questions.

Test Frequency

Performed: Monday, Thursday
Results available in 4-7 days.

Reference Range

<2 Years	Not established
2-17 Years	260-630 ng/mL
≥18 Years	267-616 ng/mL

Performing Department

Send Outs

Performing Department Laboratory Location

Sent to Quest Diagnostics- Wood Dale, IL

Methodology

Chromatography/Mass Spectrometry

CPT

83542

Reviewed Date

11/2/2025

Orderable Regions