Tc-99(m)-tetrofosmin imaging was performed in 23 thyroid cancer patients and compared with whole-body I-131 scans, neck ultrasonography and plasma thyroglobulin levels. Of 22 patients with differentiated thyroid cancer, 8 showed identical images on I-131 scan and tetrofosmin; 1 patient with medullary cancer had identical images with Tc-99(m)-DMSA and Tc-99(m)-tetrofosmin, the findings being confirmed by sonography.
The potential usefulness of Tc-99(m)-tetrofosmin imaging in the follow-up of thyroid cancers is discussed.