How did a thyroid goiter and nodules grow so fast. 5 months! was just diagnosed 6 days ago with hyperthyroidism?

Toxic nodular Goiter: Toxic nodular goiter can hide a 10-20% risk of thyroid cancer. Need a beta-blocker like propranolol to control some symptoms like rapid heart rate to prevent heart failure. http://www.thyroid.org/patient-thyroid-information/ct-for-patients/vol-6-issue-11/vol-6-issue-11-p-6-7/ http://www.endocrine.niddk.nih.gov/pubs/Hyperthyroidism/ http://www.nlm.nih.gov/medlineplus/ency/article/000317.htm