Fig. 1
From: Signet cell rectal carcinoma with prostatic involvement detected by FAPI-04 PET-MRI fusion
A FDG MIP, B MIP image of FAPI shows focus of uptake below the bladder (slender black arrow). C and D are axial fused images of FDG and FAPI PET-CT, respectively. The fused axial images of FAPI clearly show increased uptake (SUVmax-6.8) in prostate compared to FDG which shows only mild uptake. E H & E at 200× magnification image revealed normal prostate gland with corpora amylacea highlighted by blue arrows and tumour cells with signet ring morphology highlighted by bold black arrows, thus confirming the prostatic involvement by signet cell adenocarcinoma. F axial MRI and G FAPI MRI fusion images which show involvement of prostate. Seminal vesicles and base of bladder were also involved; (not shown H) contrast-enhanced diagnostic CT image which shows no significant abnormality