通常生长于腹部，但也可发生在骨盆部，例如骶部的交感神经链。

The tumors usually arise in the abdomen but can also grow in the pelvis, likely from sacral extensions of the sympathetic chain.

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椎管内麻醉病人应证明有排泄能力，这是骶部交感神经消失的证据。

Following administration of an epidural or spinal anesthetic, the patient should demonstrate the ability to void. This provides evidence that residual sympathetic blockade has dissipated.

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椎管内麻醉病人应证明有排泄能力，这是骶部交感神经消失的证据。

Following administration of an epidural or spinal anesthetic, the patient should demonstrate the ability to void. This provides evidence that residual sympathetic blockade has dissipated.

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