NAVLE（北美执业兽医考题）Day 569

Q1:A 9-year-old German shepherd is presented with unchecked bleeding from a cut on the gums above the right canine tooth. The owner relates that the dog has lost weight and had an episode of collapse 3 days ago, but he recovered. On physical exam, the gums are pale with petechiae and ecchymotic hemorrhages. There is tachycardia and a palpable cranial abdominal mass.一只9岁的德国牧羊犬因右犬齿上方牙龈伤口出血前来就诊。主人说这条狗最近体重降低，并且在三天前晕倒了一次，但现在已经正常了。体格检查发现其牙龈苍白，有瘀点和瘀斑出血。有心动过速和明显的腹前部肿块。A coagulation profile shows the following:其凝血功能检测结果如下Thrombocytes 血小板= 82,533 per microliter..[N=200,000-900,000]Buccal mucosal bleeding time (BMBT), 颊粘膜出血时间，increased 延长Activated partial thromboplastin time (aPTT), increased 延长Prothrombin time (PT), increased 延长Thrombin time (TT), increased 延长Fibrin degradation products (FDPs), increased 延长What disorder of coagulation best fits this pattern?此类病变提示哪种类型的凝血障碍？