Fig. 1

A 47-y-old woman with cancer cells detected in ascites and serum tumor marker CA125 greater than 5000U/ml. PET/CT images (A–D) show two focal increased FDG uptake in the pelvic cavity and corresponding slightly high dense lesions on the CT images (C, arrows). PET/MRI images (a–j) show higher FDG uptake. One lesion was solid (c, red arrow) and the other was cystic solid (c, f, I, yellow arrow) on T2-weighted images. The location and composition of the lesions showed by MRI help distinguish primary ovarian lesions (yellow arrow) from peritoneal metastases (red arrow)