PMC4885115_01
A multilocular cystic tumor was observed in segment IV of the liver. The tumor was 45 mm in diameter and had septations. CT revealed calcification of the cystic wall and slight wall thickness. There was no mural nodularity or communication to bile ducts.
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The tumor had septations and border calcification in some areas as well as slight wall thickness (Fig. 1).
T2-weighted MRI revealed a high intensity on the ventral side and low intensity on the backside of the tumor. Fluid-fluid level was observed on the border, thereby leading to the suspicion that mild hemorrhage may have occurred in the cystic tumor.
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T2-weighted MRI revealed fluid-to-fluid level in the cystic tumor that was suggestive of mild hemorrhage (Fig. 2).
The cyst was covered with single layer of epithelial cells (hematoxylin-eosin stain, left). Ovarian-like stroma was observed showing positive immunostaining for both estrogen (upper right) and progesterone receptors (bottom right).
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Ovarian-like stroma was confirmed by positive immunostaining for both estrogen and progesterone receptors (Fig. 3).