False Positive Findings on I-131 WBS and SPECT/CT in Patients with History of Thyroid Cancer: Case Series

Figure 1

(a) Anterior and posterior planar views from a diagnostic I-131 WBS show focal uptake in the right pelvis (arrow). (b) Transverse sonographic image of the right adnexa shows a lobulated complex solid and cystic lesion with internal vascularity. (c) SPECT/CT localizes the area of radioiodine uptake to the right adnexal lesion, which on final pathology after surgical resection showed an endometrioma. (d) Anterior and posterior planar views from a postablation I-131 WBS show expected radiotracer uptake in the neck as well as an incidental focus of intense activity in the left lower thorax (arrow). (e) Axial CT image through the lower thorax shows a nondisplaced fracture of the left twelfth rib. (f) SPECT/CT localizes the area of radioiodine uptake to the left twelfth rib, which was biopsied and showed no evidence of malignancy.

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