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目的：研究中间区污染对上颌恶性肿瘤预后的影响，并探讨处理方法。方法：回顾性分析1979年至1989年间的254例上颌恶性肿瘤病例。结果：222例获得随访，首次未行须清术101例及首次已行预清术121例中分别有27例及23例出现颈部转移。结论：中间区污染影响上颌恶性肿瘤的预后，应采取积极措施如对中间区进行术后放疗。
Objective: To study the influence of the pollution in the middle area on the prognosis of maxillary malignant tumor and to explore the treatment method. Methods: A retrospective analysis of 254 cases of maxillary malignant tumors from 1979 to 1989 was performed. Results: Of the 222 patients who were followed up, there were 27 cases and 121 cases with no neck dissection in 101 cases who did not require dissection and 121 cases in the first pretreatment. Conclusion: The influence of the pollution in the middle area on the prognosis of maxillary malignant tumors should be taken as positive measures such as postoperative radiotherapy in the middle area.