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Fig. 1 | BMC Neurology

Fig. 1

From: MR imaging features of benign retroperitoneal paragangliomas and schwannomas

Fig. 1

A patient (age: 60–69) with hypertension and a histologically proven benign retroperitoneal paraganglioma in the right prevertebral region (between the inferior vena cava and aorta). The transverse and longitudinal diameters of the tumour are 8 cm and 9.25 cm, respectively. a On axial T2WI, the tumour appears with high signal intensity compared with the gluteal muscles. The intratumoural cystic areas are higher in signal intensity. b On axial DWI, the tumour appears circular and nodular, with high signal intensity. c, (d) and (e) In T1WI (in-phase, out-of-phase and pre-scanned imaging), part of the tumour signal is slightly lower than that of the gluteal muscle, and most of it is slightly higher than that of the gluteal muscle. f On contrast T1WI during the aerial phase, the tumour exhibits obvious and inhomogeneous enhancement. g On coronal T1WI during the delay phase, the tumour exhibits obvious and inhomogeneousenhancement. h On ADC imaging, the mean ADC value of the ROI of the tumour is 0.00119 mm2/s

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