Cause of Ascites?

Think this is an interesting CT scan of abdomen.A lady was admitted to medical for "Ascites for invesigation" - as usual, everything under the sun will be "for medical to find out". She complained of progressive abdominal distension and discomfort, and there was a vague mass felt on abdominal palpation.What do you think the CT (circled area) shows? (You can click to enlarge)