Are these the same test?: Can anyone clarify for... - Thyroid UK

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Are these the same test?

Tanyaking profile image
6 Replies

Can anyone clarify for me if these two tests which are worded differently are in fact the same test please.

Thyroid Peroxidase Antibody

Anti-thyroid peroxidase

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Tanyaking
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6 Replies

Do you have a result to share? Is the abbreviated version TPO?

Tanyaking profile image
Tanyaking in reply toMary-intussuception

Yes I’ve typed the results out below..no there’s no mention of TPO

helvella profile image
helvellaAdministrator

In years past, we would often see antibodies referred to as "anti-Thyroid Peroxidase antibodies" - a bit of a mouthful. In recent years we more often see it simplified to "Thyroid Peroxidase antibodies".

This dropping of the first "anti-" is widespread across all antibodies. Not universal, and there is obviously a huge amount of literature which used the convention of the time and will not be updated.

Simply, the answer is yes, they are the same.

Tanyaking profile image
Tanyaking in reply tohelvella

Thank you in 2017 her result was

Thyroid peroxidase antibody....10.9 Kiu/L < 34 kIU/L

And in 2018 it was

19 IU/ml <34

So it’s doubled in a year ,would that indicate a test this year to see if it’s raised at All?

Mary-intussuception profile image
Mary-intussuception in reply toTanyaking

My TPO (Thyroid Peroxidase Antibodies ) result was 300 when finally diagnosed with Hashimoto's Autoimmune Thyroiditis and Hypothyroidism.

Does she have any diagnosis of Hypothyroidism /Underactive Thyroid?

Does she have any symptoms? Have you looked up the list on the Thyroid UK website?

Have any other tests been done? Such as Thyroid Function Tests (Tfts):

FreeT3

FreeT4

TSH

What about Tg (Thyroglobulin ) and /or an Ultrasound scan of her Thyroid?

and any nutrients levels especially :

Vitamin D

B12

Folate

and Ferritin?

helvella profile image
helvellaAdministrator in reply toTanyaking

Antibody levels do vary over time - and both test results were negative. I am pretty sure that that level of change could occur within a much shorter time than a year. And that had they been done at different times they could, possibly, have been the other way around.

However, there is no reason to NOT test again. Other than cost!

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