Fig. 3

The radiological features on MR images and corresponding HE and Ki-67 of IHC. The radiological features on MR images and corresponding HE (hematoxylin-eosin staining, × 400) and Ki-67 of IHC (Immunohistochemistry], × 400). a–c A 70-year-old woman with high-grade serous papillary cystadenocarcinoma. a An axial T2FSE (T2-weighted imaging fat-suppressed fast spin-echo) image shows a cystic mass with solid nodules in the left ovary (red line) which contains homogeneous slightly higher signal intensity area (red arrow). b HE of high-grade serous papillary cystadenocarcinoma. c IHC of high-grade serous papillary cystadenocarcinoma displaying high Ki-67 PI (proliferative index) (80%). d–f A 64-year-old woman with high-grade serous cystadenocarcinoma. d An axial T2FSE image shows a fused cystic-solid mass (red line) from bilateral ovaries which looks like sponge and contains no homogeneous slightly higher signal intensity area. e HE of high-grade serous cystadenocarcinoma. f IHC of high-grade serous cystadenocarcinoma displaying low Ki-67 PI (40%). g–i A 32-year-old woman with non-invasive micropapillary serous carcinoma. g An axial T2FSE image shows a solid mass in the left ovary (red line) which contains no homogeneous slightly higher signal intensity area. h HE of non-invasive micropapillary serous carcinoma. i IHC of non-invasive micropapillary serous carcinoma low Ki-67 PI (10%)