A, Pathological examination showed extensive coagulation necrosis of myometrium and degenerative chorionic villus (arrow, hematoxylin-eosin stain, original magnification ×60). B. D, Axial and sagittal T1-weighted brain MRI showing the low-intensity metastatic lesion (arrow). C, T2-weighted image demonstrating the high-signal mass. E. G, After chemotherapy, the low-intensity metastatic lesion diminishes on axial and sagittal T1-weighted image and edema subsided compared with pre-chemotherapy. F, The high-intensity mass also shrinks on T2-weighted image.