Mature cystic ovarian teratoma
Right flank pain.
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A few tiny gallstones are seen less than 5mm.
Mild hydroureteronephrosis is present at right side due to an 8×4mm distal ureteral stone (603HU), adjacent to the VUJ. A 3mm stone also is present at lower calyces of the left kidney.
82×76mm fat containing mass with well-defined and smooth margins is present at left adnexa containing a soft tissue nodule.
Typical appearance of mature cystic ovarian teratoma with a Rokitansky nodule or dermoid plug. A Rokitansky nodule or dermoid plug refers to a solid protuberance projecting from an ovarian cyst in the context of a mature cystic teratoma. This region has the highest propensity to undergo malignant transformation.