Figure 5b:

Images in a 67-year-old man after external beam radiation therapy for Gleason 4+5 PCa with a current prostate-specific antigen of 2.01 ng/mL. (a) Axial T2*-weighted MR image prior to ferumoxytol injection shows hyperintense LN in right common iliac chain (arrow). (b) LN shows hyperintense signal pattern on DW MR image (b value, 800 sec/mm²) (arrow). (c) Axial T2*-weighted MR image at 24 hours after injection of 7.5 mg Fe/kg ferumoxytol and (d) DW MR image (b value, 800 sec/mm²) show maintenance of hyperintense signal pattern, indicating lack of ferumoxytol uptake within this LN (arrow in c and d). Findings are consistent with PCa metastases within this right common iliac chain LN.