Maldague B E, Malghem J J
Radiology. 1976 Dec;121(3 Pt. 1):567-74. doi: 10.1148/121.3.567.
Unilateral arch hypertrophy (UAH) may be generated by a contralateral deficiency which is most commonly a pars defect (43 out of 50 patients studied). Such a defect can also cause rotational instability. When present, both can be easily detected on simple anteroposterior views through the resulting pedicular and pars asymmetry and spinous process tilt. From simple anteroposterior views, one can predict that at least one arch defect does exist, that it is unstable, and not of recent origin.
单侧椎弓根肥大（UAH）可能由对侧缺损引起，其中最常见的是椎弓根峡部裂（在所研究的50例患者中有43例）。这种缺损也可导致旋转不稳定。当存在这些情况时，通过由此产生的椎弓根和椎弓根峡部不对称以及棘突倾斜，在简单的前后位X线片上就可以很容易地检测到。从简单的前后位X线片上，人们可以预测至少存在一个椎弓根缺损，它是不稳定的，且不是近期出现的。
