Title: Pheochromocytoma: Positive on <sup>131</sup>I-MIBG single-photon emission computed tomography-computed tomography and negative on <sup>68</sup>Ga DOTANOC positron emission tomography-computed tomography
Abstract: Pheochromocytomas are tumors arising from sympathetic lineage-derived cells in adrenal medulla, and 68Ga DOTANOC positron emission tomography-computed tomography (PET-CT) has been found to be superior than 131I MIBG single-photon emission computed tomography-computed tomography (SPECT-CT) for initial localization/diagnosis of the adrenal lesion. We discuss the 68DOTANOC PET-CT and 131I MIBG SPECT-CT findings of a 24-year-old male who presented with clinical and biochemical findings suspicious of pheochromocytoma.