Table 1.
Clinical findings of 19 patients with OCCCs.
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).
Fig 2.
Bilateral OCCCs in a 47-year-old woman (Patient 10 in Tables 1 and 2) presenting with abdominal distension for 2 months.
A-C Axial (A), sagittal T2WI (B) and plain (non-contrast) T1WI (C) showing a left-side, large, well-defined multilocular cystic mass with a few irregular lumen solid protrusions and many irregular septations (> 3 mm, arrow) and similar MRI findings of a right-side, small, multilocular cystic mass with protrusions (arrow head). The SI of the cyst was high on T2WIs and low on T1WI. The solid protrusions had heterogeneous iso-slightly high SI on T2WIs and iso-SI on T1WI. Bulk ascites were detected. D, E Enhanced T1WIs showing markedly heterogeneous and prolonged enhancement solid protrusions and septations (arrow). F The tumor shows a cyst lined with hobnail cells. Secretions were found in the lumen of the cyst. (HE 40 & 10).
Fig 3.
An OCCC in a 57-year-old woman (Patient 16 in Tables 1 and 2) with a pelvic lump incidentally detected on US.
A-C Axial (A), coronal T2WI (B) and plain (non-contrast) T1WI (C) showing an oval well-defined solid mass with a few small cystic areas (high on T2WIs and low on T1WI, arrow) at the periphery segment of the tumor. The solid portion showed iso-SI on T1WI and high SI on T2WIs. D, E Enhanced T1WIs showing the markedly heterogeneous and prolonged enhancement solid mass with nonenhanced small cystic areas (arrow). F The tumor shows varying-sized cysts lined by papillary structure. The majority of tumor cells are oxyphilic cells with abundant eosinophilic cytoplasm. (HE 20 & 10).
Fig 4.
An OCCC in a 56-year-old woman (Patient 15 in Tables 1 and 2) with a pelvic lump incidentally detected on US.
A-C Axial (A), sagittal T2WI (B) and plain (non-contrast) T1WI (C) showing a well-defined solid mass with central patchy, irregular necrosis areas (high on T2WIs and low on T1WI, arrow). The solid portion had intermediate SI on T2WIs and T1WI. D, E Enhanced T1WIs showing the heterogeneous and prolonged enhancement solid mass with central nonenhanced necrosis areas (arrow). F The tumor shows a papillary pattern with clear cells proliferating in a fibrous stoma. (HE 20 & 10).
Table 2.
MRI characteristics of 21 OCCCs in 19 patients.
Table 3.
Statistical results of clinical and imaging features between cystic and solid tumors.