FIGURE 1. Typical adrenal incidentaloma SPECT study at 72 h after ¹³¹I-NP-59 injection in patient classified, according to Reincke (8), as PC-CS. Scintigraphic study shows typical example of concordant pattern: increased radiotracer uptake on side of lesion demonstrated on CT scan (4 x 5 cm left corticoadrenal adenoma).