Fig 1. An OCCC in a 59-year-old woman (Patient 7 in Tables 1 and 2) with frequent and urgent micturition and a pelvic lump.

A-C Axial (A), coronal T2WI (B) and plain (non-contrast) T1WI (C) showing a large and irregular unilateral, multilocular well-defined cystic mass with many irregularities and a few oval lumen solid protrusions. The septations were < 3 mm (arrow). The SI of the cyst was very high on T2WIs and high on T1WI. The solid protrusions had heterogeneous intermediate SI on T2WIs and T1WI (A-C). D, E Enhanced T1WIs showing markedly heterogeneous and prolonged enhancement solid protrusions, with nonenhanced portions (arrow) indicating effusion, as shown by pathology results. The thickened wall was enhanced. F The tumor shows a solid pattern with clear cells. (HE 40 & 10).