Figure 4.

The patient underwent left partial mastectomy and total thyroidectomy followed by 3 courses (2, 6, and 10 months after surgery, respectively) of I-131 therapy for the metastatic FTC. The I-131 ablative doses ranged from 100 to 150 mCi. I-131 WBS and SPECT/CT scan were performed five to seven days after each ablative treatment. During all 3 courses of ablation therapy, I-131 WBS showed negative result in the breast site, indicating the absence of significant breast metastasis after FTC. Additional SPECT/CT scans showed that the nodular shadow of the left breast surgical area was gradually absorbed with the 3 courses of I-131 therapy (arrow). FTC, follicular thyroid carcinoma; WBS, whole-body scan; SPECT, single photon emission computed tomography; CT, computed tomography.