Thanks for using Healthcaremagic,
After going through the details provided by you, She is having Goitre which is multinodular.
Her thyroid function tests
are normal that means it is nontoxic as there are no symptoms of hyperthyroidism
Goitre is caused by iodine deficiency
so make sure it is not there by consumption of iodized salt.
Regarding treatment option as thyroid function FT3,FT4 and TSH are normal I presume that is why no antithyroid drug can be given this is correct. These medicines are given only when there is high T3 and T4.
You should consult a Endocrinologist
and Surgeon to discuss various treatment option for her.
Surgery is one of the option for removal of goitre and another option recently is ethanol ablation of the nodules.
Hope this information helps you.
Wish her good health.
Dr.Akhilesh Dubey M.D