Humeral Chondrosarcoma in a Hokkaido Brown Bear (Ursus arctos yesoensis)

被引:4
作者
Murakami, Tomoaki [1 ,2 ,3 ]
Kobayashi, Yoshiyasu [1 ]
Chiba, Shiori [1 ]
Kurauchi, Yuki [4 ]
Sakamoto, Hideyuki [5 ]
Sasaki, Motoki [6 ]
Matsui, Takane [1 ]
机构
[1] Obihiro Univ Agr & Vet Med, Dept Basic Vet Med, Lab Vet Pathol, Obihiro, Hokkaido 0808555, Japan
[2] Gifu Univ, United Grad Sch Vet Sci, Gifu 5011193, Japan
[3] Gifu Univ, Lab Food & Environm Hyg, Dept Vet Med, Gifu 5011193, Japan
[4] Sahoro Resort Bear Mt, Shintoku, Hokkaido 0810039, Japan
[5] Noboribetsu Bear Pk, Noboribetsu 0590551, Japan
[6] Obihiro Univ Agr & Vet Med, Dept Basic Vet Med, Lab Vet Anat, Obihiro, Hokkaido 0808555, Japan
关键词
brown bear; chondrosarcoma; humerus; metastasis; SQUAMOUS-CELL CARCINOMA;
D O I
10.1292/jvms.12-0083
中图分类号
S85 [动物医学(兽医学)];
学科分类号
0906 ;
摘要
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.
引用
收藏
页码:1195 / 1197
页数:3
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