NAVLE（北美执业兽医考题）Day 488

单选题，正确答案是100分，非正确答案为0分，Good Luck！

Q1:A 12- year-old spayed female black Scottish terrier is presented with a three week history of limping on the right forelimb. The second digit of the paw is enlarged, ulcerated, and bleeding with a loose toenail. A lytic bone lesion of the 3rd phalanx is visible on radiographs, and cytology of a fine needle aspirate of the mass suggests neoplasia. If biopsy of the mass confirms malignant subungual melanoma, which one of the following choices contain the best advice to the owner?一只12岁的已绝育雌性黑色苏格兰梗出现持续3周的右前肢跛行。脚掌的第二趾肿胀，破溃，指甲松动。X光片可见第三指骨出现骨溶解性病变，FNA采样后的细胞学检查提示肿瘤性病变。如果活检报告显示指甲的恶性黑色素瘤，以下哪个选项是告知主人最好的建议？Find out the answer by clicking on one of the listed choices. Good luck!点击列出的选项找出答案，祝大家好运

A - Long-term prognosis is excellent if the tumor is completely resected. 完全切除肿瘤的话预后良好

B - Metastasis is common. Radical excision, plus adjuvant therapies is typically recommended 转移很常见。一般推荐完全切除外加辅助治疗

C - Due to the exquisite sensitivity of melanoma to radiotherapy, it is preferred as a sole treatment 黑色素瘤对放疗的敏感性非常高，可以作为唯一的首选治疗方法

D - DNA-based vaccine encoding human tyrosinase is effective against oral tumors but not licensed for subungual melanoma 编码人类酪氨酸酶的DNA疫苗对口腔肿瘤有效，但未批准用于爪下黑色素瘤

E - Nail bed melanomas in dogs are almost always benign and respond well to cryotherapy 犬的甲床黑色素瘤基本都是良性的，一般对冷冻疗法反应良好

NAVLE（北美执业兽医考题）Day 488

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