Humeral Chondrosarcoma in a Hokkaido Brown Bear (Ursus arctos yesoensis)
スポンサーリンク
概要
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Humeral chondrosarcoma was found in an 18-year-old male Hokkaido brown bear (Ursus arctos yesoensis). Necropsy revealed a large firm mass under the left superficial pectoral muscle at the axillary region. The mass involved the left shoulder joint and peripheral muscles, and connected to the head of the humerus with osteolysis. Histopathologically, the mass was composed of irregularly shaped myxomatous to cartilaginous tumor lobules. The tumor cell showed moderate nuclear atypia with a relatively high mitotic index, especially in the edges of the myxomatous lobules. The tumor cells were positively immunostained with vimentin and S-100 protein. Based on these findings, the tumors were diagnosed as chondrosarcoma. Metastases were found in the left axillary lymph node, lungs, liver and kidney.
著者
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Sasaki Motoki
Department Of Basic Veterinary Sciences Obihiro University Of Agriculture And Veterinary Medicine
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Sasaki Motoki
Laboratory Of Veterinary Anatomy Obihiro University Of Agriculture And Veterinary Medicine
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SAKAMOTO Hideyuki
Noboribetsu Bear Park
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Sasaki Motoki
Obihiro Univ. Agriculture And Veterinary Medicine Obihiro Jpn
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KOBAYASHI Yoshiyasu
Laboratory of Veterinary Pathology, Division of Pathological Science, Department of Basic Veterinary
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Sasaki Motoki
Laboratory Of Anatomy Obihiro University Of Agriculture And Veterinary Medicine
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MATSUI Takane
Laboratory of Veterinary Pathology, Department of Basic Veterinary Medicine, Obihiro University of Agriculture and Veterinary Medicine, Obihiro 080–8555, Japan
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MURAKAMI Tomoaki
Laboratory of Veterinary Pathology, Department of Basic Veterinary Medicine, Obihiro University of Agriculture and Veterinary Medicine, Obihiro 080–8555, Japan
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CHIBA Shiori
Laboratory of Veterinary Pathology, Department of Basic Veterinary Medicine, Obihiro University of Agriculture and Veterinary Medicine, Obihiro 080–8555, Japan
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KURAUCHI Yuki
Sahoro Resort Bear Mountain, Shintoku 081–0039, Japan
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CHIBA Shiori
Laboratory of Veterinary Pathology, Department of Basic Veterinary Medicine, Obihiro University of Agriculture and Veterinary Medicine, Obihiro 080–8555, Japan
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MURAKAMI Tomoaki
Laboratory of Veterinary Pathology, Department of Basic Veterinary Medicine, Obihiro University of Agriculture and Veterinary Medicine, Obihiro 080–8555, Japan
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SAKAMOTO Hideyuki
Noboribetsu Bear Park, Noboribetsu 059–0551, Japan
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KOBAYASHI Yoshiyasu
Laboratory of Veterinary Pathology, Department of Basic Veterinary Medicine, Obihiro University of Agriculture and Veterinary Medicine, Obihiro 080–8555, Japan
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SASAKI Motoki
Laboratory of Veterinary Anatomy, Department of Basic Veterinary Medicine, Obihiro University of Agriculture and Veterinary Medicine, Obihiro 080–8555, Japan
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