Fig. 6

a A 63-year-old woman with pathologically confirmed ovarian cancer. During follow-up after the successful initial treatment, including surgery and first-line chemotherapy, CA-125 gradually increased. Axial T2-weighted PET/MR image shows the left para-aortic lymph node with FDG uptake (arrow). b Contrast-enhanced CT shows the left para-aortic lymph node less than 1 cm in short-axis diameter with slightly enhancement (arrow). After second-line chemotherapy, this lymph node decreased in size and SUV, suggesting this node as a sign of recurrence