PMC4077553_01
Pheochromocytoma imaging features. Pheochromocytoma mass (arrows) with heterogeneous appearance in computed tomography (A), revealing hypointense signal on T1-weighted (B) and hyperintense signal on T2-weighted (C) sequences of magnetic resonance imaging, and high uptake on 123I-mIBG scintigraphy (D,E).
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F1
MRI findings were suggestive of pheochromocytoma and the mass showed high uptake on 123I-mIBG scintigraphy (Figure 1).
Histologic analysis. Nested arrangement of cells (Zellballen) with large cytoplasm and prominent nucleolus (HE, 400x) (A), and immunohistochemical staining for synaptophysin (400x) (B), confirming the diagnosis of pheochromocytoma.
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F2
The mass was excised and histological analysis confirmed the diagnosis of pheochromocytoma (Figure 2).