A 63-year-old woman with a left ovarian cystadenocarcinoma. (A) An axial T1-weighted image shows a left pelvic mass with isointensity. (B) Axial T2-weighted image reveals that the mass is a solid tumor with low signal intensity. (C) Axial diffusion-weighted imaging (DWI) obtained at b = 1,000 s/mm2 reveals the solid tumor as hyperintense with a lower apparent diffusion coefficient (ADC) value (circle 1, ADC = 0.769 × 10-3 mm2/s). (D) Axial contrast-enhanced T1-weighted image demonstrates marked enhancement of the solid part.