Dihydrotestosterone
Test ID:
706603
CPT code:
82642
Synonyms:
•Androstaner-3-one
•DHT
•Hydroxy-5α
Clinical Use:
Dihydrotestosterone and dihydrotestosterone/ratio may be used for differential diagnosis of diseases of sexual differentiation (DSD). DHT levels may be inappropriately low compared to testosterone levels in 5a-reductase deficiency. It is recommended by guidelines to measure the ratio of testosterone to DHT.
DHT levels may also be monitored to follow the effectiveness of 5a-reductase inhibitor treatment in female alopecia.
Specimen Type:
Serum (preferred) or plasma, frozen
Requested Volume:
1 mL
Minimum Volume:
0.5 mL
Container Type:
Red-top tube, gel-barrier tube, lavender-top (EDTA) tube, or green-top (heparin) tube
Collection:
Separate serum or plasma from cells within one hour of collection. Send serum or plasma in plastic transport tube. Transfer specimen to a plastic transport tube before freezing. To avoid delays in turnaround time when requesting multiple tests on frozen samples, please submit separate frozen specimens for each test requested.
Storage Instructions:
Freeze
Stability Requirements:
Temperature |
Period |
---|---|
Room temperature |
7 days |
Refrigerated |
7 days |
Frozen |
19 months |
Freeze/thaw cycles |
Stable x6 |
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