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HelpOrder Code E1 Estrone, Serum
Reporting Name
Estrone, SUseful For
As part of the diagnosis and workup of precocious and delayed puberty in females and, to a lesser degree, males
As part of the diagnosis and workup of suspected disorders of sex steroid metabolism (eg, aromatase deficiency and 17 alpha-hydroxylase deficiency)
As an adjunct to clinical assessment, imaging studies and bone mineral density measurement in the fracture risk assessment of postmenopausal women, and, to a lesser degree, older men
Monitoring low-dose female hormone replacement therapy in postmenopausal women
Monitoring antiestrogen therapy (eg, aromatase inhibitor therapy)
Testing Algorithm
For information see Steroid Pathways.
Performing Laboratory
Mayo Clinic Laboratories in Rochester
Specimen Type
Serum RedSpecimen Required
Supplies: Sarstedt Aliquot Tube, 5 mL (T914)
Collection Container/Tube: Red top (Serum gel/SST are not acceptable)
Submission Container/Tube: Plastic vial
Specimen Volume: 1.2 mL
Collection Instructions: Within 2 hours of collection, centrifuge and aliquot serum into a plastic vial.
Additional Information: For more information see Steroid Pathways.
Specimen Minimum Volume
0.7 mL
Specimen Stability Information
| Specimen Type | Temperature | Time |
|---|---|---|
| Serum Red | Refrigerated (preferred) | 28 days |
| Ambient | 28 days | |
| Frozen | 28 days |
Special Instructions
Reference Values
CHILDREN*
1-14 days: Estrone levels in newborns are very elevated at birth but will fall to prepubertal levels within a few days.
Males
|
Tanner stages# |
Mean age |
Reference range |
|
Stage I (>14 days and prepubertal) |
7.1 years |
Undetectable-16 pg/mL |
|
Stage II |
11.5 years |
Undetectable-22 pg/mL |
|
Stage III |
13.6 years |
10-25 pg/mL |
|
Stage IV |
15.1 years |
10-46 pg/mL |
|
Stage V |
18 years |
10-60 pg/mL |
#Puberty onset (transition from Tanner stage I to Tanner stage II) occurs for boys at a median age of 11.5 (± 2) years. For boys there is no proven relationship between puberty onset and body weight or ethnic origin. Progression through Tanner stages is variable. Tanner stage V (adult) should be reached by age 18.
Females
|
Tanner stages# |
Mean age |
Reference range |
|
Stage I (>14 days and prepubertal) |
7.1 years |
Undetectable-29 pg/mL |
|
Stage II |
10.5 years |
10-33 pg/mL |
|
Stage III |
11.6 years |
15-43 pg/mL |
|
Stage IV |
12.3 years |
16-77 pg/mL |
|
Stage V |
14.5 years |
17-200 pg/mL |
#Puberty onset (transition from Tanner stage I to Tanner stage II) occurs for girls at a median age of 10.5 (± 2) years. There is evidence that it may occur up to 1 year earlier in obese girls and in African American girls. Progression through Tanner stages is variable. Tanner stage V (adult) should be reached by age 18.
*The reference ranges for children are based on the published literature(1,2), cross-correlation of our assay with assays used to generate the literature data and on our data for young adults.
ADULTS
Males: 10-60 pg/mL
Females
Premenopausal: 17-200 pg/mL
Postmenopausal: 7-40 pg/mL
Conversion factor
E1: pg/mL x 3.704=pmol/L (molecular weight=270)
For International System of Units (SI) conversion for Reference Values, see https://www.mayocliniclabs.com/order-tests/si-unit-conversion.html
Day(s) Performed
Monday through Sunday
CPT Code Information
82679
Method Description
Estrogens are fractionated into estradiol and estrone by the liquid chromatography tandem mass spectrometry
(LC-MS/MS). The LC-MS/MS method employs an organic extraction to remove water-soluble conjugates and to allow for concentration of the sample. The method is free from interference and represents a reference methodology.
17 beta-estradiol and estrone are extracted from 0.5 mL of serum with the organic solvent ethyl acetate. Deuterated 17 beta-estradiol-d5 and estrone-d4 are added to each sample before the liquid extraction and serve as internal standards. After derivatization with dansyl chloride, high-pressure liquid chromatography (HPLC) is used prior to introduction of the derivatized sample extract into the LC-MS/MS.(1,2) The mass spectrometer has an APCI (Atmospheric Pressure Chemical Ionization) interface and is operated in the multiple- reaction monitoring positive mode. The calibration utilizes an eight-point standard curve over a concentration range of 0 to600 pg./mL.(Unpublished Mayo method)
Reject Due To
| Gross hemolysis | OK |
| Gross lipemia | OK |
| Gross icterus | OK |
Method Name
Liquid Chromatography Tandem Mass Spectrometry (LC-MS/MS)