spina bifida occulta of chest

例句：

1. 1. The child's condition is a rare but serious medical issue.
   这个孩子的状况是一种罕见的但严重的医疗问题。
2. 2. This surgery aims to repair the damaged spinal cord and prevent further complications.
   这种手术旨在修复受损的脊髓，以防止进一步并发症。
3. 3. The patient has been under close observation for several weeks, hoping for a successfuloutcome.
   患者已经接受了几周的密切观察，希望有一个成功的结果。