11.有關頸椎退化性疾病之手術敘述，下列何者錯誤？
(A)頸椎脊髓病變（cervical myelopathy）產生症狀，即需手術治療
(B)急性神經根壓迫，可先保守治療
(C)老年人接受後側椎弓切除術，日後很容易產生脊柱後凸變形
(D)前頸椎手術可能傷到recurrent laryngeal nerve

Fusion surgery may be performed along with the laminectomy in the following cases1:

• Accompanying conditions such as degenerative spondylolisthesis, lateral listhesis, or degenerative scoliosis
• Removal of more than 50% of facet joints during a laminectomy
• Tall disc space (especially in young patients)
• Multilevel laminectomies

As a general rule, instability of the spine preoperatively and/or a postoperative instability due to extensive laminectomy is considered for spinal fusion surgery. The presence of osteophytes, markedly narrow disc space, and older age of the patient may reduce the need for fusion after lumbar laminectomy because they provide additional stabilizing effects on the lumbar motion segments.