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  • 2 labs, 2 different measurements

    hi, im misha's wife sarah. we have a question regarding the way labs measure tumor markers. no one here, including our dr and the lab technicians can answer our question(honestly, not kidding...typical of egypt). the lab we normally get blood work done at measures AFP in IU/ml(11.5). the lab we got our 2nd opinion blood test done at used ng/ml(17.4). are they using the same measurement and calling it different things? i know ng/ml seems to be standard in north america, and iv never seen AFP measured in IU/ml anywhere in all our reading online. are they the same thing? anyone have any thoughts?

  • #2
    I definitely would not make decisions based on two measurements in different units from two different labs!

    See this definition of IU, or International Unit: http://www.medterms.com/script/main/...rticlekey=9650
    Scott, [email protected]
    right inguinal orchiectomy 6/5/2003 > nonseminoma, stage I > surveillance > L-RPLND 6/24/2005 for recurrence, suspected teratoma but found seminoma, stage II > chylous ascites until 9/2005 > surveillance and "all clear" since


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    • #3
      sarah:
      Welcome. I just took this from a tc cancer web site. "Please note that AFP is normally less than about 5 ng/ml, but cancer cannot be assumed until it is over 25 ng/ml." Everyplace I checked measures in ng/ml but I'm sure you can do a converson from one to the other, it should just be a matter of some math formula. You may have seen this site already but check out the informaton they have. http://tcrc.acor.org/.
      Son Jason diagnosed 4/30/04, stage III. Right I/O 4/30/04. Graduated College 5/13/04. 4XEP 6/7/04 - 8/13/04. Full open RPLND 10/13/04. All Clear since.

      Treated by Dr. Rakowski of Midland Park, NJ. Visited Sloan Kettering for protocol advice. RPLND done at Sloan Kettering.

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      • #4
        Originally posted by dadmo
        I'm sure you can do a converson from one to the other, it should just be a matter of some math formula.
        ...except that an "IU" varies depending on what is being measured.
        Scott, [email protected]
        right inguinal orchiectomy 6/5/2003 > nonseminoma, stage I > surveillance > L-RPLND 6/24/2005 for recurrence, suspected teratoma but found seminoma, stage II > chylous ascites until 9/2005 > surveillance and "all clear" since


        Your donation funds Livestrong services for people facing cancer now. Please sponsor my ride!

        Comment


        • #5
          According to one source, for AFP, "1 IU/ml is equivalent to 1.21 ng/ml." Assuming that's accurate, your two readings are 13.9 ng/mL and 17.4 ng/mL (but still from different labs).
          Scott, [email protected]
          right inguinal orchiectomy 6/5/2003 > nonseminoma, stage I > surveillance > L-RPLND 6/24/2005 for recurrence, suspected teratoma but found seminoma, stage II > chylous ascites until 9/2005 > surveillance and "all clear" since


          Your donation funds Livestrong services for people facing cancer now. Please sponsor my ride!

          Comment

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