Testosterone Total


Sunquest Code:TEST  
Epic Code:LAB3766Epic Name:Testosterone Total
Order Instructions:Do not collect in gold gel microtainer.
Methodology:Liquid chromatography/Tandem mass spectrometry
CPT Code:84403
Turnaround Time:Performed Mon-Fri; results are reported the next day.


Collection Instructions

Specimen:Blood
Optimal Volume:2 mL
Minimum\Peds Volume:0.6 mL
Collection Instructions:A plain red top tube with gel is also acceptable Gold gel containers are not acceptable.
Causes for Rejection:Collection in gold gel container.


Processing and Shipping

Specimen Processing:Centrifuge and aliquot 1 mL, 0.2 mL minimum. Store in refrigerator.
Shipping Instructions:Ship at refrigerated temperature. Alternatively, ship on dry ice.
Test Performed at or Referral Lab Drug Analysis  (UMMC-East Bank)


Interpretive

Reference Range:
Males ng/dL
0-5 mo 75-400
6 mo - 9 y <2-20
10 - 11 y <2-130
12-13 y <2-800
14 y <2-1200
15-16 y 100-1200
17-18 y 300-1200
19 y and older 240-950

 
Females ng/dL
0 - 5 mo 20-80
6 mo - 9 y <2-20
10 - 11 y <2-44
12 - 16 y <2-75
17 - 18 y 20-75
19 y and older 8-60
 
 
Tanner Stages Male Female
I (prepubertal) <2-20 <2-20
II 8-66 <2-47
III 26-800 17-75
IV 85-1200 20-75
V (young adult) 300-950 12-60


Puberty onset (transition from Tanner Stage I to Tanner Stage II) occurs for boys at a median age of 11.5 years and for girls at median age of 10.5 years. There is evidence that it may occur up to 1 year earlier in obese girls and in African American girls. For boys there is no definite proven relationship between puberty onset and body weight or ethnic origin. Progression through Tanner stages is variable. Tanner Stage V (young adult) should be reached by age 18.
 
Use:
Used to evaluate virilization in women, and to evaluate testicular function in men.  


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