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HelpTest Code FTWC Testosterone Free, Females or Children
Clinical Indications
Most sensitive test for detection of hyperandrogenemia in women and children.
Additional Test Codes
Epic Order Name: FREE TESTOSTERONE WOMEN AND CHILDREN (aka
FTWC)
Sunquest Order Code: FTWC
Epic Px Code: LAB2934
Specimen Collection Type
Preferred: Gold
Acceptable: Red
Minimum Collection Volume
0.8 mL
Reference Range
|
Female Free Testosterone, pg/mL |
Male Free Testosterone, pg/mL |
|
1-6 years: Less than 0.6 pg/mL |
1-6 years: Less than 0.6 pg/mL |
|
7-9 years: 0.6-1.8 pg/mL |
7-9 years: 0.1-0.9 pg/mL |
|
10-11 years: 0.1-3.5 pg/mL |
10-11 years: 0.1-6.3 pg/mL |
|
12-13 years: 0.9-6.8 pg/mL |
12-13 years: 0.5-98.0 pg/mL |
|
14-15 years: 1.2-7.5 pg/mL |
14-15 years: 3-138.0 pg/mL |
|
16-17 years: 1.2-9.9 pg/mL |
16-17 years: 38.0-173.0 pg/mL |
|
18-30 years: 0.8-7.4 pg/mL |
18 years and older: 47-244 pg/mL |
|
31-40 years: 1.3-9.2 pg/mL |
Tanner Stage I: Less than or equal to 3.7 pg/mL |
|
41-51 years: 1.1-5.8 pg/mL |
Tanner Stage II: 0.3-21 pg/mL |
|
Postmenopausal: 0.6-3.8 pg/mL |
Tanner Stage III: 1.0-98.0 pg mL |
|
Tanner Stage I: Less than 2.2 pg/mL |
Tanner Stage IV: 35.0-169.0 pg/mL |
|
Tanner Stage II: 0.4-4.5 pg/mL |
Tanner Stage V: 41.0-239.0 pg/mL |
|
Tanner Stage III: 1.3-7.5 pg mL |
|
|
Tanner Stage IV: 1.1-15.5 pg/mL |
|
|
Tanner Stage V: 0.8-9.2 pg/mL |
|
Critical Value
n/a
Interpretation
The concentration of free testosterone is derived from a mathematical expression based on the constant for the binding of testosterone to SHBG.
Specimen Availability for Add-on Testing
2 Days
Specimen Stability
Refrigerated (preferred): 1 week
Ambient: 24 hours
Frozen: 6 months
Day(s) Performed
Sun-Sat
Performing Lab - Department
TUKHS-BH-Mail Outs
CPT Code
84402
LOINC Code
2991-8
Test Alias
N/A
Additional Information / Notes
Testosterone Free, Females and Children by tandem mass spectrometry, only provides a result for the free testosterone value (pg/mL).