Hikita M, Yabuki Y, Ishikawa Y, Shibahara T, Kadota K
Ishikari Livestock Hygiene Service Center, Sapporo, Japan.
J Vet Med Sci. 1999 Oct;61(10):1157-9. doi: 10.1292/jvms.61.1157.
A 1.5-year-old Holstein heifer had a subcutaneous tumor mass (20 cm diameter) on the ventral portion of the neck, and the tumor was diagnosed as a locally invasive myofibroblastoma. It consisted of moderately cellular fibrous tissue, and the interlobular septum of the thymus was invaded by tumor cells. The neoplastic cells were positive for alpha smooth muscle actin and vimentin, but not for desmin. Electron microscopy disclosed the presence of moderately developed rough endoplasmic reticulum and microfilaments with focal densities.
一头1.5岁的荷斯坦小母牛颈部腹侧有一个皮下肿瘤块（直径20厘米），该肿瘤被诊断为局部浸润性肌成纤维细胞瘤。它由细胞中度丰富的纤维组织构成，肿瘤细胞侵犯了胸腺的小叶间隔。肿瘤细胞α平滑肌肌动蛋白和波形蛋白呈阳性，但结蛋白呈阴性。电子显微镜检查显示存在中度发达的粗面内质网和有局灶性致密物的微丝。
