PMC4310098_01
Axial fused fluorodeoxyglucose (FDG) positron emission tomography/computed tomography (CT) (left) and unenhanced CT (right) images demonstrating marked FDG avidity within enlarged seminal vesicles (arrows) extending into the adjacent prostate. No further sites of FDG avid disease were demonstrated
UA-7-107-g001.jpg
PMC4310098_01_UA-7-107-g001.jpg
F1
However, subsequent fluorodeoxyglucose (18F-FDG) positron emission tomography/CT (PET/CT) revealed abnormal activity within the seminal vesicles [Figure 1] and so he went on to have a transrectal ultrasound scan which confirmed abnormal appearances of the seminal vesicles.
(a) Tumor (right) at the base of the seminal vesicle (left) x50. (b) Bland cytological atypia in a papillary yolk sac tumor with fibrovascular core x200. (c) Areas showing yolk sac tumor with microcystic/reticular pattern with vacuolated cytoplasm x400. (d) Positive staining for alpha fetoprotein. This was focal but strong x400
UA-7-107-g002.jpg
PMC4310098_01_UA-7-107-g002.jpg
F2
Histology confirmed YST of both seminal vesicles extending into the prostate with clear margins and negative pelvic lymph nodes [Figure 2].