A well defined large sized pelvic thin-walled cystic lesion which is not clearly separable from the right ovary, measuring about 17 x 16 x 15 cm, with a fat-fluid level and multiple Rokitansky soft tissue nodules of 4 x 3.5 cm in diameter at the junction of the fat-fluid level and few septations. No ossification or calcification within the mass is seen. The mass caused extrinsic indentation of the urinary bladder, uterus, and sigmoid colon.