Volume 46, Issue 3 pp. 93-100
CASE REPORT

Hepatocellular carcinoma with intracranial metastasis in a Japanese macaque (Macaca fuscata)

Takako Miyabe-Nishiwaki

Corresponding Author

Takako Miyabe-Nishiwaki

Primate Research Institute, Kyoto University, Aichi, Japan

T. Miyabe-Nishiwaki and A. Hirata are contribute equally to the work.

Correspondence

Takako Miyabe-Nishiwaki, Center for Human Evolution Modeling Research, Primate Research Institute, Kyoto University, Aichi, Japan.

Email: [email protected]

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Akihiro Hirata

Akihiro Hirata

Division of Animal Experiment, Life Science Research Center, Gifu University, Gifu, Japan

T. Miyabe-Nishiwaki and A. Hirata are contribute equally to the work.Search for more papers by this author
Akihisa Kaneko

Akihisa Kaneko

Primate Research Institute, Kyoto University, Aichi, Japan

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Akiyo Ishigami

Akiyo Ishigami

Primate Research Institute, Kyoto University, Aichi, Japan

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Yoko Miyamoto

Yoko Miyamoto

Primate Research Institute, Kyoto University, Aichi, Japan

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Atsushi Yamanaka

Atsushi Yamanaka

Primate Research Institute, Kyoto University, Aichi, Japan

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Keishi Owaki

Keishi Owaki

Laboratory of Veterinary Pathology, Department of Veterinary Medicine, Faculty of Applied Biological Sciences, Gifu University, Gifu, Japan

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Hiroki Sakai

Hiroki Sakai

Laboratory of Veterinary Pathology, Department of Veterinary Medicine, Faculty of Applied Biological Sciences, Gifu University, Gifu, Japan

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Tokuma Yanai

Tokuma Yanai

Laboratory of Veterinary Pathology, Department of Veterinary Medicine, Faculty of Applied Biological Sciences, Gifu University, Gifu, Japan

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Juri Suzuki

Juri Suzuki

Primate Research Institute, Kyoto University, Aichi, Japan

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First published: 03 April 2017
Citations: 4

Abstract

Background

A 23-year-old male Japanese macaque (Macaca fuscata) showed left ptosis, which progressed to exophthalmos.

Methods

The macaque underwent a clinical examination, CT and MRI, and was euthanized. Necropsy and histopathological examination were performed after euthanasia.

Results

The CT revealed and MRI confirmed an intracranial mass at the skull base with orbital extension. At necropsy, there were a large hepatic mass and an intracranial mass compressing the left temporal lobe of the brain. Histopathological and immunohistological examinations revealed that the masses were hepatocellular carcinoma (HCC) and a metastatic lesion. In both the primary and metastatic lesions, neoplastic hepatocytes were arranged mainly in a trabecular pattern. Immunohistochemically, the tumor cells were positive for cytokeratin (AE1/AE3 and CAM5.2) and hepatocyte paraffin 1 and negative for cytokeratin 7 and 20 and vimentin.

Conclusion

To our knowledge, this is the first case report of HCC with intracranial metastasis in a macaque.

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