A Case of Ciliated Hepatic Foregut Cyst Simulating a Solid Tumor

Michio Abe, Hirofumi Kako, Shigeru Katafuchi, Sadamu Takano, Yasuji Ishimaru*, Michio Ogawa

Department of Surgery II, Kumamoto University Medical School
*Department of Surgical Pathology, Kumamoto University Hospital

We report a case of ciliated hepatic foregut cyst showing echogenic mass in the lesion under ultrasonography. The patient was 57-year-old man who was admitted to our department because of IIc type early gastric carcinoma in the lesser curvature of the antrum. Abdominal US revealed a hypoechoic cystic lesion measuring 1.9×1.4 cm in the left medial lobe of the liver (S4). An echogenic mass, simulating a solid tumor, was detected within the cystic lesion. Computerized tomography showed a well-demarcated low density area with homogenous inner struture. Based on these findings, cyst adenoma/adenocarcinoma was suspected. Therefore, resection of the cystic lesion was performed. The cyst was unilocular and contained viscous tan liquid, but no solid mass was observed in the cyst. Histopathological examination of the resected specimen provided a diagnosis of ciliated foregut cyst of the liver. In Japan, we found only 8 cases of ciliated hepatic foregut cyst including our case, and 4 of 5 cases in which US findings were mentioned showed high echogenicity or echogenic mass. It is important to role out these benign cysts from hepatic solid tumors.

Key words
hepatic cyst, ciliated foregut cyst, early gastric cancer

Reprint requests
Hirofumi Kako Department of Surgery II, Kumamoto University Medical School
1-1-1 Honjou, Kumamoto City, 860 JAPAN

Accepted
December 8, 1993

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