An X-Ray and CT often show a bamboo spine, which is caused by the ossification of the annulus fibrosus on the outside of a straightened spine, giving it a hollow appearance!
X线摄片和CT通常可见“竹节样”改变；变直的脊柱外缘的纤维环骨化导致脊柱看起来像是空心的一样！
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