20 year old with thyroid nodule(s)

[Amanda411]

Hello,

I am a 20 year old female with a history of hypothyroidism.  I noticed a nodule in the lower part of my neck upon palpation.  After bringing this to my primary care physician's attention, I was sent for an ultrasound.  The results were:
normal appearing left and right lobe of the thyroid and hypoechoic solid nodule inferior and slightly posterior to the left lobe of the thyroid.  It measured 0.75 cm x 0.61 cm.  Color doppler was unremarkable. The radiologist stated it could be an exophytic thyroid nodule or parathyroid adenoma.  
I then had blood work.  The results for PTH and Calcium were completely normal.  TSH was low (0.03) and my Endocrinologist readjusted my Levoxyl dosage.
My PCP then sent me for a CT Scan.  In summary, subtle nodular lesions were found posterior and inferior to the left lobe of the thyroid.  This may be a single bilobular lesion.  Possibility of parathyroid adenoma should be considered. (This was performed before the bloodwork results came back normal).  No large lymphadenopathy was noted.  Submental lymph nodes were a few millimeters and thought to be inflammatory in nature.

Now here's the problem:
The PCP is concerned.
The Endocrinologist is laughing that I'm even considering moving forward with testing.
The ENT says he doesn't think what I'm feeling is what is seen on the images (since the nodule(s) is posterior and I'm feeling it anteriorly) but that he's going to perform another ultrasound and FNA if he finds something.  He basically blew off the images because they were "small".

Any input on all this would be greatly appreciated.  Should I be concerned?  Is it a waste of time to go through add'l testing?

[Amanda411]

Thank you for your input.  The ENT did an FNA of the lesion tonight.  He stated that he thinks it may be an ectopic thyroid and that it was indeed the nodule that I was feeling (though he did admit that if I weren't as thin as I am I probably would have never felt it). He stated that it appears to be between the thyroid and the muscle and that it's not parathyroid. I guess we will see what happens! Thanks again.

[Mark Lupo, M.D.]

It is possible to have a non-functional parathyroid enlargement.  
More likely this is a small lymph node reacting to hashimoto's (cause of hypothyroidism)
it is not likely that you are feeling what is being described on US or CT.  
Would adjust thyroid meds as suggested and follow this abnormality with US in 6-12 months and keep an eye on calcium levels.

[Amanda411]

I forgot to add that the ENT states that it feels like it could be in the muscle?