A tubular retractor system is subsequently deployed after tissue dilation is performed.
在软组织充分扩张后安放管状牵开器系统。
The tubular retractor is removed, allowing the tissue to close. The surface wound is covered with a samll bandage.
取出通道牵开器，使组织闭合，表面伤口用小敷料包扎。 。
Conclusion: MRI is very sensitive to show the early changes in bone marrow and surrounding soft tissue so it plays an important role in the diagnosis of long tubular bone metastasis.
结论：MRI对长管状骨转移性肿瘤所造成的骨髓和周围软组织的变化十分敏感，所以它对长管状骨转移的诊断具有重要的意义。
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