Fig. 3

Axial CT images (A, pre-contrast; B, arterial phase; C, venous phase) revealing a moderately enhanced low-density mass (red arrows) in the right thyroid. 99mTc-MIBI SPECT/CT images (D, maximum intensity projection; E, axial SPECT; F, axial SPECT/CT fusion) showing focal tracer accumulation in a mass (red arrows) located in the right thyroid