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Can someone clarify thyroid volume?
Been seeing some posts about thyroid volume. I've posted my US results as snippets. Here is the full report. Is volume the different measurements of the lobes themselves? And, does mine say anything to anyone?
Thanks in advance!
Thyroid Echo March 07
Findings: The right lobe of the thyroid measures 4.6 x 1.6 x 1.6 cm while the left lobe measures 4.4 x 1.7 x 1.1 cm. Isthmus measures 2 mm in AP dimension. Within the right lobe of the thyroid there are three hypoechoic noudlues measuring 2mm, 3mm and 3mm in diameter. Within the left lobe of the thyroid there are two small nodules within the upper and mid-pole measuring 3mm and 2mm in diameter. Within the inferior pole there is a comples nodule measuring 1.4 x 1 x 0.8 c,. Remainder of the thyroid parenchyma is diffusely irregular in echogenicity. Contour of thyroid gland is also mildly irregular.
Impression: Findings consistent with multinodular goiter with a single large nodule measuring 1.4 cm in greatest diameter. Malignancy cannot be excluded and histologic evaluation is recommended.
Thanks in advance!
Thyroid Echo March 07
Findings: The right lobe of the thyroid measures 4.6 x 1.6 x 1.6 cm while the left lobe measures 4.4 x 1.7 x 1.1 cm. Isthmus measures 2 mm in AP dimension. Within the right lobe of the thyroid there are three hypoechoic noudlues measuring 2mm, 3mm and 3mm in diameter. Within the left lobe of the thyroid there are two small nodules within the upper and mid-pole measuring 3mm and 2mm in diameter. Within the inferior pole there is a comples nodule measuring 1.4 x 1 x 0.8 c,. Remainder of the thyroid parenchyma is diffusely irregular in echogenicity. Contour of thyroid gland is also mildly irregular.
Impression: Findings consistent with multinodular goiter with a single large nodule measuring 1.4 cm in greatest diameter. Malignancy cannot be excluded and histologic evaluation is recommended.
Oops I added wrong number :)
Your calculation is correct
being smaller then average does not mean too small [the low normal is 7 cu cm]
For your case they used term goiter because of the nodules [the 'size' criteria does not apply here]
Your calculation is correct
being smaller then average does not mean too small [the low normal is 7 cu cm]
For your case they used term goiter because of the nodules [the 'size' criteria does not apply here]
Okay. I think I get it. But 8.2 + 11.8 = 20 x .46 = 9.2. Does that mean my thyroid is smaller than "average" and the only reason I'm classified as having a goiter is because of the nodules?
Please forgive my ignorance. I'm just trying to educate myself.
Please forgive my ignorance. I'm just trying to educate myself.
Thyroid volume or displacement is used to determine if thyroid is enlarged.
In the past the longest dimension of each lobe was used for this criteria but it was inaccurate.
WHO established the upper limit of volume of 18 cu cm for women and 21 cu cm for men [2002]
To calculate
Multiply all sizes for each lobe 4.4 x 1.7 x 1.1=8.2
4.6 x 1.6 x 1.6=11.8
Add both products 8.2+11.8=24
Multiply this sum by 0.46 correction factor, [remember the lobes are not boxes !]
This should be about 11 cu cm
The average volume for female thyroids in the U.S.A. is about 11 cu cm
However the modern medical terminology require to use term ‘goiter for any gland where nodule is found.
Traditionally, before 1973 the term goiter was used to describe thyroid swelling, visible on the neck or determined by palpation
In the past the longest dimension of each lobe was used for this criteria but it was inaccurate.
WHO established the upper limit of volume of 18 cu cm for women and 21 cu cm for men [2002]
To calculate
Multiply all sizes for each lobe 4.4 x 1.7 x 1.1=8.2
4.6 x 1.6 x 1.6=11.8
Add both products 8.2+11.8=24
Multiply this sum by 0.46 correction factor, [remember the lobes are not boxes !]
This should be about 11 cu cm
The average volume for female thyroids in the U.S.A. is about 11 cu cm
However the modern medical terminology require to use term ‘goiter for any gland where nodule is found.
Traditionally, before 1973 the term goiter was used to describe thyroid swelling, visible on the neck or determined by palpation
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