A 51-year-old woman with papillary thyroid cancer had recurrent disease. An unexpected FDG-avid hepatic metastasis was identified. Follow-up contrast-enhanced CT scan showed a hepatic lesion, compatible with malignancy. Histopathologic examination demonstrated metastatic carcinoma, consistent with thyroid primary. Few studies reported liver metastases originating from thyroid cancer on FDG PET. These were medullary thyroid carcinomas (MTC) or poorly differentiated cancers. There are no reports describing liver metastasis from PTC diagnosed by FDG PET/CT.
From the Divisions of *Nuclear Medicine and Molecular Imaging and †Body Imaging, Department of Radiology, Stanford University Medical Center, Stanford, CA.
Received for publication January 17, 2012; and revision accepted April 23, 2012.
Conflicts of interest and sources of funding: none declared.
Reprints: Andrei Iagaru, MD, Division of Nuclear Medicine and Molecular Imaging, Department of Radiology, Stanford University Medical Center, 300 Pasteur Dr, H-2200, Stanford, CA 94305. E-mail: firstname.lastname@example.org.