sacral seta

例句：

1. 1. The patient was diagnosed with a sacral seta infection.
   患者被诊断出患有骶骨突起感染。
2. 2.During surgery, the surgeon removed a sacral seta to relieve pressure on the nerve.
   在手术中，外科医生移除了一个骶骨突起以减轻对神经的压力。
3. 3. The patient's condition worsened after the removal of the sacral seta.
   患者在移除骶骨突起后病情恶化。