・ Macrocalcifications rather than microcalcifications ・ Tendency to locate in superolateral portions of upper-middle parts ・ More vascularity than PTC ・ Larger at the time of diagnosis (2.3 ± 1.5 cm vs. 1.1 ± 1.1 cm) ・ Focal cystic degeneration more often than PTC ・ Solid component more homogenous than PTC ・ Regular margins rather than spiculated contours is possible ・ Metastatic lymph nodes of MTC do not display hyperechogenicity ・ The strongest distinguisher is serum calcitonin levels. |