NAVLE（北美执业兽医考题）Day 611

A 6-year old male neutered Weimaraner presents for left forelimb lameness. Radiographs are shown below and show a mixed productive and destructive lesion affecting the left distal radius with accompanying soft tissue swelling. The lesion does not cross the joint. What is the most common primary bone tumor in the dog？

一只6岁已绝育雄性魏玛犬由于左前肢跛行前来就诊。其X光片如下图，显示了一个影响左桡骨远端的生产性和破坏性混合病变，伴有软组织肿胀。病变没有穿过关节。狗最常见的原发性骨肿瘤是什么？