Just under a month ago I had an ultrasound of my thyroid. The left lobe showed a large multinodular goitre, the left lobe also showed up hot on the nuclear scan, the right showed 6 nodules the largest measured 38mm x 14mm this nodule is solid and was cold on the nuclear scan, all the other nodules were smaller than 10 mm. Today I had a second biopsy done on the largest nodule on the right side( the first biopsy didn't contain enough cells). I asked my specialist if she could ask for the measurements because I felt that the nodule had grown. Today it measured 43mm x 19mm. Is this considered fast growing?