A B C D E F G H I J K L M N O P Q R S T U V W X Y Z # |
Dihydrotestosterone
Test CodeDihydrotest
Quest Code
90567
CPT Codes
82642
Preferred Specimen
1 mL serum collected in a red-top tube (no gel)
Minimum Volume
0.6 mL
Transport Temperature
Room temperature
Specimen Stability
Room temperature: 7 days
Refrigerated: 14 days
Ffrozen: 6 months
Refrigerated: 14 days
Ffrozen: 6 months
Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Moderate to gross hemolysis • Serum Separator Tube (SST®) • Plasma • Grossly icteric
Methodology
Chromatography/Mass Spectrometry
FDA Status
This test was developed and its analytical performance characteristics have been determined by Quest Diagnostics. It has not been cleared or approved by FDA. This assay has been validated pursuant to the CLIA regulations and is used for clinical purposes.
Setup Schedule
Night
Reference Range
Female | ≤20 ng/dL |
Male | 12-65 ng/dL |
Clinical Significance
DHT is a potent androgen derived from testosterone via 5-Alpha-Reductase activity. 5-Alpha-Reductase deficiency results in incompletely virilized males (phenotypic females). This diagnosis is supported by an elevated ratio of testosterone to DHT.
Performing Laboratory
Quest Diagnostics Nichols Institute
33608 Ortega Highway
San Juan Capistrano, CA 92690-6130