An Analysis of Computed Tomography Imaging Features and Predictive Factors for Postoperative Recurrence and Metastasis of Abdominal Paragangliomas

Figure 2

One case of a pathologically confirmed liver paraganglioma in a 60-year-old female. (a) Noncontrast CT scan showed a well-defined lesion in the liver segment IV with a mean diameter of 22 mm. (b, c) Contrast-enhanced CT scans showed homogenous and significant enhancement with the “halo sign,” peritumor feeding, or draining enlarged vessels (arrow). The CT values of the noncontrast, arterial, and venous phases were 35, 199, and 120 HU, respectively. The lesion was misdiagnosed as benign hemangioma or FNH tumour following preoperative CT. (d) The tumor cells were arranged in nests, surrounded by fibrovascular stroma.