How long does it take to get back pathology results from a fna of the thyroid?

Often 1-2 days: Usually one set of microscopic slides is prepared right away and a second set is prepared using a different method overnight. Your pathologist will look at both sets the next day. Often a diagnosis can be made then (about 1 day), although if additional tests need to be performed on the sample to confirm the diagnosis, it may add another day or so. The report usually goes to your doctor first.

Not long: Depending on the lab, the result should be available in a day or two. It may take longer if any special studies or consultation is needed. In some cases, the result may be available sooner, especially if the aspirated was done by the pathologist.

Thyroid FNA Results: Average reporting of FNA results in the US is 2 to 3 days, if any additional studies (such as immunohistochemistry) are required for dignosis then it could take up to 5 days.