Objective:

To evaluate the imaging features of CT in patients with pathologically proved ovarian clear cell carcinoma (CCC).

Methods:

The CT imaging findings of 11 patients with histopathologically proven ovarian CCC were retrospectively analyzed by two radiologists in consensus. The imaging features were evaluated including the location

size

margin

mass characteristic

attenuation of cystic and solid portions

and presence of protruding mass into the lumen

etc.

Results:

The lesions were located unilaterally in ten patients and bilaterally in one patient. Nine lesions showed mixed appearance of cystic and solid nodules

and two lesions were solid masses. The average size of the

tumors was 16.1 cm (ranging from 10.5 cm to 22.5 cm). The average CT attenuation of the cystic portion was 18 HU (ranging from 11 to 55 HU). Protruding masses appeared in nine lesions with enhancement. The CT attenuation value of solid portion was 34 to 49 HU on plain scan

46 to 57 HU in the arterial phase

and 56 to 66 HU in the venous phase. The CT attenuation valu was 39 HU and 46 HU in two solid masses. 5 cases had abdominal cavity effusion and 3 cases had peritoneal irregular flocculent or nodular thickening without lymph node enlargement.

Conclusion:

On CT imaging the ovarian CCC is shown as large unilocular

mainly cystic and smooth marginated mass with protruding solid portion into the lumen and high-attenuated cystic portion.