Every large city has its shifting population of vagrants.But in most _____ these are poor men.
参考答案
参考解析
【单选题】
患者男,28岁,右膝内侧逐渐隆起伴隐痛半年。X片示:右胫骨干骺端有一破坏区,边缘呈膨胀性改变,中央有肥皂泡样阴影。诊断首先考虑
骨软骨瘤
骨巨细胞瘤
骨肉瘤
骨转移性癌
骨囊肿