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| Imaging study of the relationship of parapharyngeal space infiltration in nasopharyngeal cancer withlymph node and distant metastasis(analysis of 59 cases) |
| YU Ming-ji1, XU Tan-sha1, CHEN Yu-tang2 |
| 1. Department of Radiology, Shanghai Jiangwan Hospital, Shanghai 200434, China; 2. Zhejiang Province Tumor Hospital, Hangzhou 310022, China |
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Abstract Objective: To evaluate the relationship between the parapharyngeal space involvement of nasopharyngeal carcinoma(NPC) and cervical lymph node metastasis along with the distant metastasis by the analysis of the imaging. We can offer more imaging informations for clinic to diagnose NPC earlier. Materials and Methods: CT or MR features of NPC in 59 cases which were proved by pathology were analyzed retrospectively and were divided into two groups depending on whether the parapharyngeal space was involved or not. We analysed and compared the two groups whether cervical lymph node metastasis and distant metastasis were happened or not by chi-square test. Results: Involvements of the poststyloid space and retropharyngeal space had significant relation with the cervical lymph node metastasis(P<0.01), involvement of the prestyloid space was irrelevant to the cervical lymph node metastasis(P＞0.05). Among the primary focus of NPC, when the lateral wall was infiltrated by the tumor, the rate of cervical lymph node metastasis was the highest(83.3%); when the top and posterior wall was extended. The rate of cervical lymph node metastasis was of the second highest(71.9%). Among the cases of NPC, when the oropharynx, hypopharynx and the 9, 10, 11, 12th cranial nerves were involved, the distinction of the proportions of whether cervical lymph node metastasized or not was relevant. The distant metastasis was relevant to the cervical lymph node metastasis(P＜0.05). Conclusion: The parapharyngeal space involvement of nasopharyngeal carcinoma was pertinent to the cervical lymph node metastasis and distant metastasis.
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Received: 28 January 2008
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2008, Vol. 19 
