目的：探讨骶神经根囊肿的影像学特点，提高临床诊断水平。
Purpose: To study the features of medical images of sacral nerve root cysts and improve the clinic diagnosis.
关节突关节肥大或滑囊囊肿可造成腰椎侧方和中央狭窄，这将对神经根造成压迫。
FJ hypertrophy or a synovial cyst can contribute to lateral and central lumbar stenosis, which can lead to impingement on the exiting nerve root.
神经束囊肿通常偶然发现的，但很少会引起机械性的神经根压迫。
Perineural cysts are usually an incidental finding, but rarely may cause mechanical nerve root compression.
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