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Test Code DHTS Dihydrotestosterone, Serum

Reporting Name

Dihydrotestosterone, S

Useful For

Monitoring patients receiving 5-alpha reductase inhibitor therapy or chemotherapy

 

Evaluating patients with possible 5-alpha reductase deficiency

Testing Algorithm

For more information see Steroid Pathways.

Performing Laboratory

Mayo Clinic Laboratories in Rochester

Specimen Type

Serum


Specimen Required


Collection Container/Tube:

Preferred: Red top

Acceptable: Serum gel

Specimen Volume: 1 mL

Collection Instructions: Centrifuge and aliquot serum into a plastic vial.


Specimen Minimum Volume

0.6 mL

Specimen Stability Information

Specimen Type Temperature Time Special Container
Serum Refrigerated (preferred) 7 days
  Frozen  90 days

Special Instructions

Reference Values

Males

Cord blood: ≤100 pg/mL

≤6 months: ≤1,200 pg/mL

Tanner Stages

Mean

Age

Reference range (pg/mL)

Stage I (>6 months and prepubertal)

7.1 years

≤50

Stage II

12.1 years

≤200

Stage III

13.6 years

80-330

Stage IV

15.1 years

220-520

Stage V

18 years

240-650

>19 years: 112-955 pg/mL

 

Females

Cord blood: ≤50 pg/mL

≤6 months: ≤1,200 pg/mL

Tanner Stages

Mean

Age

Reference range (pg/mL)

Stage I (>6 months and prepubertal)

7.1 years

≤50

Stage II

10.5 years

≤300

Stage III

11.6 years

≤300

Stage IV

12.3 years

≤300

Stage V

14.5 years

≤300

20-55 years: ≤300 pg/mL

>55 years: ≤128 pg/mL

 

1. Pang S, Levine LS, Chow D, et al: Dihydrotestosterone and its relationship to testosterone in infancy and childhood. J Clin Endocrinol Metab 1979;48:821-826

2. Stanczyk FZ: Diagnosis of hyperandrogenism: biochemical criteria. Best Pract Res Clin Endocrinol Metab 2006;20(2):177-191

Day(s) Performed

Monday, Wednesday, Friday

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

82642

G0480 (if appropriate)

LOINC Code Information

Test ID Test Order Name Order LOINC Value
DHTS Dihydrotestosterone, S 1848-1

 

Result ID Test Result Name Result LOINC Value
81479 Dihydrotestosterone, S 1848-1

Report Available

2 to 8 days

Reject Due To

Gross hemolysis OK
Gross lipemia OK
Gross icterus OK

Method Name

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

Portions of this test are covered by patents held by Quest Diagnostics