Fig. 15

Malignant solitary fibrous tumor originating from the prostatic urethra in a 62-year-old male with a slightly elevated serum PSA level (4.770 ng/mL) and a Foley catheter to relieve urinary retention (white arrow). a T2WI shows a heterogeneously hyperintense nodule (1.8 cm in size) with an obscured hypointense capsule (arrowhead) behind and adjacent to the prostatic urethra in the prostate. b, c DWI at a b-value of 1400 s/mm² and ADC maps show that the nodule exhibits mildly and inhomogeneously restricted diffusion. d DCE imaging shows continuously mild and heterogeneous enhancement of the nodule. e, f Coronal fat-suppressed T2WI and DWI at a b-value of 1400 s/mm² show the nodule protruding into the bladder (black arrow)