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Test Code Epic LAB982 Estrone, Serum

Additional Codes

SQ code ESTRNM

Mayo code E1

Reporting Name

Estrone, S

Specimen Type

Serum Red

Performing Laboratory

Mayo Clinic Laboratories in Rochester

Useful 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.


Specimen 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

Test Classification

This test was developed and its performance characteristics determined by Mayo Clinic in a manner consistent with CLIA requirements. It has not been cleared or approved by the US Food and Drug Administration.

CPT Code Information

82679

LOINC Code Information

Test ID Test Order Name Order LOINC Value
E1 Estrone, S 2258-2

 

Result ID Test Result Name Result LOINC Value
81418 Estrone, S 2258-2

Reject Due To

Gross hemolysis OK
Gross lipemia OK
Gross icterus OK

Method Name

Liquid Chromatography Tandem Mass Spectrometry (LC-MS/MS)

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)

Report Available

2 to 6 days