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| Email: | mcl@mayo.edu |
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Test Id : HGH
Growth Hormone, Serum
Useful For
Suggests clinical disorders or settings where the test may be helpful
Suggests clinical disorders or settings where the test may be helpful
Diagnosis of acromegaly and assessment of treatment efficacy when interpreted in conjunction with results from glucose suppression test
Diagnosis of human growth hormone deficiency when interpreted in conjunction with results from growth hormone stimulation test
This test is not intended for use as a screen for acromegaly.
This test has limited value in assessing growth hormone secretion in normal children.
Method Name
A short description of the method used to perform the test
A short description of the method used to perform the test
Immunoenzymatic Assay
NY State Available
Indicates the status of NY State approval and if the test is orderable for NY State clients.
Indicates the status of NY State approval and if the test is orderable for NY State clients.
Yes
Reporting Name
Lists a shorter or abbreviated version of the Published Name for a test
Lists a shorter or abbreviated version of the Published Name for a test
Growth Hormone, S
Aliases
Lists additional common names for a test, as an aid in searching
Lists additional common names for a test, as an aid in searching
Growth Hormone Provocative Test
Growth Hormone Stimulation
hGH (Human Growth Hormone)
Human Growth Hormone
Somatotrophic Hormone
Somatotropin
Specimen Type
Describes the specimen type validated for testing
Describes the specimen type validated for testing
Serum
Ordering Guidance
The recommended test for assessing growth hormone secretion in normal children is IGF1I / Insulin-Like Growth Factor 1, Serum.
The preferred test for acromegaly screening is IGF1 / Insulin-Like Growth Factor 1, Serum.
Specimen Required
Defines the optimal specimen required to perform the test and the preferred volume to complete testing
Defines the optimal specimen required to perform the test and the preferred volume to complete testing
Patient Preparation: Fasting, 8 hours
Container/Tube:
Preferred: Serum gel
Acceptable: Red top
Specimen Volume: 0.6 mL
Collection Instructions:
1. If multiple specimens are drawn, submit each vial under a separate order.
2. Label specimens appropriately with the corresponding collection times.
Forms
If not ordering electronically, complete, print, and send an Oncology Test Request (T729) with the specimen.
Specimen Minimum Volume
Defines the amount of sample necessary to provide a clinically relevant result as determined by the Testing Laboratory
Defines the amount of sample necessary to provide a clinically relevant result as determined by the Testing Laboratory
0.5 mL
Reject Due To
Identifies specimen types and conditions that may cause the specimen to be rejected
Identifies specimen types and conditions that may cause the specimen to be rejected
| Gross hemolysis | Reject |
| Gross lipemia | OK |
Specimen Stability Information
Provides a description of the temperatures required to transport a specimen to the performing laboratory, alternate acceptable temperatures are also included
Provides a description of the temperatures required to transport a specimen to the performing laboratory, alternate acceptable temperatures are also included
| Specimen Type | Temperature | Time | Special Container |
|---|---|---|---|
| Serum | Refrigerated (preferred) | 7 days | |
| Frozen | 90 days |
Useful For
Suggests clinical disorders or settings where the test may be helpful
Suggests clinical disorders or settings where the test may be helpful
Diagnosis of acromegaly and assessment of treatment efficacy when interpreted in conjunction with results from glucose suppression test
Diagnosis of human growth hormone deficiency when interpreted in conjunction with results from growth hormone stimulation test
This test is not intended for use as a screen for acromegaly.
This test has limited value in assessing growth hormone secretion in normal children.
Clinical Information
Discusses physiology, pathophysiology, and general clinical aspects, as they relate to a laboratory test
Discusses physiology, pathophysiology, and general clinical aspects, as they relate to a laboratory test
The anterior pituitary secretes human growth hormone (hGH)
Because hGH levels in normal and diseased populations overlap,
Reference Values
Describes reference intervals and additional information for interpretation of test results. May include intervals based on age and sex when appropriate. Intervals are Mayo-derived, unless otherwise designated. If an interpretive report is provided, the reference value field will state this.
Describes reference intervals and additional information for interpretation of test results. May include intervals based on age and sex when appropriate. Intervals are Mayo-derived, unless otherwise designated. If an interpretive report is provided, the reference value field will state this.
Adults
Males: 0.01-0.97 ng/mL
Females: 0.01-3.61 ng/mL
For SI unit Reference Values, see https://www.mayocliniclabs.com/order-tests/si-unit-conversion.html
Interpretation
Provides information to assist in interpretation of the test results
Provides information to assist in interpretation of the test results
Acromegaly: For suppression testing, normal subjects have a nadir human growth hormone (hGH) concentration below 0.3 ng/mL after ingestion of a 75-gram glucose dose. Patients with acromegaly fail to show normal suppression. Using the Access ultrasensitive hGH assay, a cutoff of 0.53 ng/mL for nadir hGH was found to most accurately differentiate patients with acromegaly in remission from active disease with a sensitivity of 97% (95% CI, 83%-100%) and a specificity of 100% (95% CI, 82%-100%).(1)
Deficiency: A normal response following stimulation tests is a peak hGH concentration above 5 ng/mL in children and above 4 ng/mL in adults. For children, some experts consider hGH values between 5 ng/mL and 8 ng/mL equivocal and only GH peak values greater than8 ng/mL as truly normal. Low levels, particularly under stimulation, indicate hGH deficiency.
Cautions
Discusses conditions that may cause diagnostic confusion, including improper specimen collection and handling, inappropriate test selection, and interfering substances
Discusses conditions that may cause diagnostic confusion, including improper specimen collection and handling, inappropriate test selection, and interfering substances
As the hGH test has limited value in assessing growth hormone secretion in normal children, IGF1I / Insulin-Like Growth Factor 1, Serum is recommended as the first test for assessing deficient or excess growth during childhood and adolescent development. IGF1 reference intervals for Tanner stages are available. Suspected causes of dwarfism should be diagnosed with the aid of provocative testing.
Elevated levels of human growth hormone indicate the possibility of gigantism or acromegaly, but must be confirmed with stimulation and suppression testing.
Growth hormone is secreted in surges; single measurements are of limited diagnostic value.
Clinical Reference
Recommendations for in-depth reading of a clinical nature
Recommendations for in-depth reading of a clinical nature
1. Bancos I, Algeciras-Schimnich A, Woodmansee WW, et al: Determination of nadir growth hormone concentration cutoff following oral glucose tolerance testing using the Beckman Coulter ultrasensitive growth hormone assay patients with newly diagnosed acromegaly, acromegaly in remission, and healthy subjects. Endocr Pract 2013 Jun 27:1-26
2. Camacho-Hubner C: Assessment of growth hormone status in acromegaly: what biochemical markers to measure and how? Growth Hormone IGF Res 2000;10 Suppl B:S125-299
3. Nilsson AG: Effects of growth hormone replacement therapy on bone markers and bone mineral density in growth hormone-deficient adults. Horm Res 2000;54 Suppl 1:52-57
4. Strasburger CJ, Dattani MT: New growth hormone assays: potential benefits. Acta Paediatr 1997 Nov;Suppl 423:5-11
5. Okada S, Kopchick JJ: Biological effects of growth hormone and its antagonist. Trends Mol Med 2001Mar;7:126-132
6. Veldhuis JD, Iranmanesh A: Physiological regulation of human growth hormone (GH)-insulin-like growth factor type I (IGF-I) axis: predominant impact of age, obesity, gonadal function, and sleep. Sleep 1996;19:S221-224
7. Melmed S: Pathogenesis and diagnosis of growth hormone deficiency in adults. N Engl J Med 2019 Jun 27;380(26):2551-2562. doi: 10.1056/NEJMra1817346
Method Description
Describes how the test is performed and provides a method-specific reference
Describes how the test is performed and provides a method-specific reference
The instrument used is the Beckman Coulter UniCel DXI 800. The Access Ultrasensitive human growth hormone (hGH) assay is a simultaneous one-step immunoenzymatic ("sandwich") assay. A sample is added to a reaction vessel along with polyclonal goat anti-hGH alkaline phosphatase conjugate and paramagnetic particles coated with mouse monoclonal anti-hGH antibody. The patient sample hGH binds to the monoclonal anti-hGH on the solid phase, while the goat anti-hGH-alkaline phosphatase conjugate reacts with a different antigenic site on patient sample hGH. After incubation in a reaction vessel, materials bound to the solid phase are held in a magnetic field while unbound materials are washed away. Then, the chemiluminescent substrate Lumi-Phos 530 is added to the vessel and light generated by the reaction is measured with a luminometer. The light production is directly proportional to the concentration of hGH in the sample. The amount of analyte in the sample is determined from a stored, multi-point calibration curve.(Package insert: Beckman Coulter Inc, Fullerton, CA, 03/2019)
PDF Report
Indicates whether the report includes an additional document with charts, images or other enriched information
Indicates whether the report includes an additional document with charts, images or other enriched information
No
Day(s) Performed
Outlines the days the test is performed. This field reflects the day that the sample must be in the testing laboratory to begin the testing process and includes any specimen preparation and processing time before the test is performed. Some tests are listed as continuously performed, which means that assays are performed multiple times during the day.
Outlines the days the test is performed. This field reflects the day that the sample must be in the testing laboratory to begin the testing process and includes any specimen preparation and processing time before the test is performed. Some tests are listed as continuously performed, which means that assays are performed multiple times during the day.
Monday through Friday
Report Available
The interval of time (receipt of sample at Mayo Clinic Laboratories to results available) taking into account standard setup days and weekends. The first day is the time that it typically takes for a result to be available. The last day is the time it might take, accounting for any necessary repeated testing.
The interval of time (receipt of sample at Mayo Clinic Laboratories to results available) taking into account standard setup days and weekends. The first day is the time that it typically takes for a result to be available. The last day is the time it might take, accounting for any necessary repeated testing.
1 to 3 days
Specimen Retention Time
Outlines the length of time after testing that a specimen is kept in the laboratory before it is discarded
Outlines the length of time after testing that a specimen is kept in the laboratory before it is discarded
14 days
Performing Laboratory Location
Indicates the location of the laboratory that performs the test
Indicates the location of the laboratory that performs the test
Rochester
Fees
Several factors determine the fee charged to perform a test. Contact your U.S. or International Regional Manager for information about establishing a fee schedule or to learn more about resources to optimize test selection.
Several factors determine the fee charged to perform a test. Contact your U.S. or International Regional Manager for information about establishing a fee schedule or to learn more about resources to optimize test selection.
- Authorized users can sign in to Test Prices for detailed fee information.
- Clients without access to Test Prices can contact Customer Service 24 hours a day, seven days a week.
- Prospective clients should contact their Regional Manager. For assistance, contact Customer Service.
Test Classification
Provides information regarding the medical device classification for laboratory test kits and reagents. Tests may be classified as cleared or approved by the US Food and Drug Administration (FDA) and used per manufacturer instructions, or as products that do not undergo full FDA review and approval, and are then labeled as an Analyte Specific Reagent (ASR) product.
Provides information regarding the medical device classification for laboratory test kits and reagents. Tests may be classified as cleared or approved by the US Food and Drug Administration (FDA) and used per manufacturer instructions, or as products that do not undergo full FDA review and approval, and are then labeled as an Analyte Specific Reagent (ASR) product.
This test has been cleared, approved, or is exempt by the US Food and Drug Administration and is used per manufacturer's instructions. Performance characteristics were verified by Mayo Clinic in a manner consistent with CLIA requirements.
CPT Code Information
Provides guidance in determining the appropriate Current Procedural Terminology (CPT) code(s) information for each test or profile. The listed CPT codes reflect Mayo Clinic Laboratories interpretation of CPT coding requirements. It is the responsibility of each laboratory to determine correct CPT codes to use for billing.
CPT codes are provided by the performing laboratory.
Provides guidance in determining the appropriate Current Procedural Terminology (CPT) code(s) information for each test or profile. The listed CPT codes reflect Mayo Clinic Laboratories interpretation of CPT coding requirements. It is the responsibility of each laboratory to determine correct CPT codes to use for billing.
CPT codes are provided by the performing laboratory.
CPT codes are provided by the performing laboratory.
83003
LOINC® Information
| Test Id | Test Order Name |
Order LOINC Value
Provides guidance in determining the Logical Observation Identifiers Names and Codes (LOINC) values for the order and results codes of this test. LOINC values are provided by the performing laboratory.
|
|---|---|---|
| HGH | Growth Hormone, S | 2963-7 |
| Result Id | Test Result Name |
Result LOINC Value
Applies only to results expressed in units of measure originally reported by the performing laboratory. These values do not apply to results that are converted to other units of measure.
|
|---|---|---|
| HGH | Growth Hormone, S | 2963-7 |
Test Setup Resources
Setup Files
Test setup information contains test file definition details to support order and result interfacing between Mayo Clinic Laboratories and your Laboratory Information System.
Test setup information contains test file definition details to support order and result interfacing between Mayo Clinic Laboratories and your Laboratory Information System.
Sample Reports
Normal and Abnormal sample reports are provided as references for report appearance.
Normal and Abnormal sample reports are provided as references for report appearance.
SI Sample Reports
International System (SI) of Unit reports are provided for a limited number of tests. These reports are intended for international account use and are only available through MayoLINK accounts that have been defined to receive them.
International System (SI) of Unit reports are provided for a limited number of tests. These reports are intended for international account use and are only available through MayoLINK accounts that have been defined to receive them.