Fig. 1

Preoperative imaging findings. a Preoperative contrast medium–enhanced sagittal computed tomography showed a pelvic mass lesion, measuring 112 × 62 × 58 mm. b T2-weighted sagittal magnetic resonance imaging (MRI) showed a mass with heterogeneous intensity in the pelvic cavity. c Fat-suppressed contrast medium–enhanced T1-weighted coronal MRI showed a tumour with a relatively homogeneous contrast effect in the pelvic cavity. d On angiography of the right iliac artery, the solitary fibrous tumour was found to be supplied by the right obturator artery (black arrow) and the right internal pudendal artery (white arrow)