“…The typical imaging characteristics of pheochromocytoma are a round or oval, well-circumscribed, homogeneous or heterogeneous soft-tissue mass measuring over 3 cm, increased attenuation on unenhanced CT, prominent vascularity of the mass, delayed washout of contrast media, and an high signal intensity on T 2 -weighted MRI [3,8]. In contrast, the CT features of cystic pheochromocytomas have been reported to be a relatively thick wall, the presence or absence of septa within the mass, and with persistent wall enhancement after the administration of contrast media [4], which is compatible with the findings in the present patient. The surgical indications for the removal of an incidentally discovered adrenal mass have been published [13], but the indications for the surgical resection of purely cystic adrenal masses are less clear [9].…”