Gastric Yolk Sac Tumor Complicated with Beta-Human Chorionic Gonadotropin-Producing Metastases
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- Tahara Hiroki
- Department of Medicine and Molecular Science, Gunma University Graduate School of Medicine Department of Internal Medicine, Kiryu Kosei General Hospital
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- Hirokawa Tomoyuki
- Department of Internal Medicine, Kiryu Kosei General Hospital
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- Oyama Tatsuya
- Department of Internal Medicine, Kiryu Kosei General Hospital
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- Naganuma Atsushi
- Department of Internal Medicine, Kiryu Kosei General Hospital
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- Maruta Sakae
- Department of Internal Medicine, Kiryu Kosei General Hospital
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- Ban Satoshi
- Department of Pathology, Kiryu Kosei General Hospital
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- Yoshida Katsue
- Department of Pathology, Kiryu Kosei General Hospital
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- Takagi Hitoshi
- Department of Medicine and Molecular Science, Gunma University Graduate School of Medicine
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- Mori Masatomo
- Department of Medicine and Molecular Science, Gunma University Graduate School of Medicine
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抄録
This report describes the case of 74-year-old man who had a gastric yolk sac tumor complicated with beta human chorionic gonadotropin (βhCG) producing metastases. He was a heavy drinker. He was admitted to the hospital for abdominal pain and fullness. Based on computed tomography and gastric endoscopy he was diagnosed to have gastric cancer that had metastasized to the liver, lung and lymph nodes. The level of serum alpha fetoprotein (AFP) was high at 523 ng/mL. He died of multiorgan failure six days after admission. The autopsy revealed the stomach tumor to be an AFP-positive yolk sac tumor. Lymph node metastases showed the same characteristics as the stomach tumor. However, the lesions on the liver and lung were negative for AFP and positive for hCG. The yolk sac tumor seemed to have retrodifferentiated to form an hCG-producing tumor in the metastatic lesions. A gastric yolk sac tumor is extremely rare and only eight cases of gastric yolk sac tumors have been previously reported in the literature. To avoid a misdiagnosis, careful attention should be paid to the above-mentioned morphological features and immunohistochemical findings, in addition to the clinical findings.<br>
収録刊行物
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- Internal Medicine
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Internal Medicine 47 (24), 2145-2149, 2008
一般社団法人 日本内科学会