Testosterone Total


Abbrev Code:TEST   
Order Code:LAB3766Order Name:Testosterone Total
Methodology:Liquid chromatography/Tandem mass spectrometry
CPT Codes: 84403 x1
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
Container:Red (no gel)
Collection Instructions:A plain red top tube with gel is also acceptable. Gold gel tubes or microtainers are NOT acceptable.
Causes for Rejection:Collection in gold gel container.


Processing and Shipping

Specimen Processing:Within 2 hours of collection 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 UM Special Drug/Biochemical Genetics (Y)  (Grand Itasca, 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.

Grand Itasca: None
Use:
Used to evaluate virilization in women, and to evaluate testicular function in men.  


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