结论：MRI对鼻咽癌颅底骨质破坏和咽后淋巴结的检出率高于CT。
CONCLUSIONS: MRI is more sensitive than ct in detecting skull base bone destruction and retropharyngeal lymph node involvement of NPC.
咽后外侧组淋巴结转移118例，颈上深组淋巴结转移140例。
Lymph node metastasis included lateral retropharyngeal lymph nodes 118 cases, neck upper-deep lymph nodes 140 cases.
咽后外侧组淋巴结转移118例，颈上深组淋巴结转移140例。
Lymph node metastasis included lateral retropharyngeal lymph nodes 118 cases, neck upper-deep lymph nodes 140 cases.
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