In the weeks following the procedure, the cells of the treated thyroid nodule are removed by the body’s immune system. Most patients notice the nodule has already become smaller in just two to three weeks, with solid nodules taking longer than cystic nodules.
Part or all of targeted thyroid nodules may be permanently destroyed during the procedure.
Immune cells of the body then break down the affected areas, which shrinks the nodules. The percent reduction depends on the original size and nature of the nodules, with around 40–60% after three months and about 60–90% after one year. In the years after the procedure, all that remains in the treated area is scar tissue. While some of the nodule around this scar may remain, it is generally smaller than the same nodule before treatment. The surrounding healthy thyroid gland remains unharmed and can continue to produce thyroid hormone. It is highly unlikely that thyroid hormone will be required after treatment.
Often, difficulty swallowing, feelings of pressure or tightness of the throat, or even the bulky appearance of the nodule is usually significantly decreased or no longer detectable.