Well-defined large pelvic thick-walled cystic lesion not clearly separable from the ovaries measuring approx. (9.7 × 14.5 × 13.7) cm (white arrow) with fat (white asterisk) fluid (black asterisk) level and a multiple Rokitansky soft tissue nodules (red arrow) at the junction of fat fluid level. (For interpretation of the references to colour in this figure legend, the reader is referred to the Web version of this article.)