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A routine follow-up examination of a 62-year-old woman after rectal cancer surgery. (a, b, c) PET/CT images detected three metastases in the right lung (red arrows) and four metastatic hilar lymph nodes (black arrows). (d, e, f) The corresponding axial WB-DWI (b = 600 s/mm2) showed two hyperintense lesions in the right lung (yellow arrow). One nodule in the right middle lobe was missed on WB-DWI (f).
