An 81-year-old man with known metastatic prostate cancer with recent biochemical progression underwent a PSMA PET/CT ( 18 F-piflufolastat) for restaging. Review of the images demonstrated an acute or chronic left cerebral convexity subdural hematoma on CT with corresponding radiotracer activity throughout the collection on PET. Analysis of the patient's prior imaging showed that this subdural hematoma had significantly increased in size when compared with a head CT obtained 2 months prior. The patient was referred to a nearby emergency department and underwent repeat imaging and subdural drain placement. Unfortunately, the patient died secondary to rapid reaccumulation of subdural blood products after intervention.
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