出血坏死性上颌窦炎临床表现颇似恶性肿瘤，不易及早作出准确诊断，易误诊，影响治疗。现将我科收治经手术病理证实，临床资料完整的21例报告分析如下。1临床资料1．1一股资料：21例中，男9例，女12例，年龄11～66岁，平均36．5岁。病程2个月～8年，平均1．5年。全为单侧发病， Hemorrhagic necrotizing maxillary sinusitis is very similar to the clinical manifestations of malignant tumors, difficult to make an accurate early diagnosis, misdiagnosis, affecting the treatment. Now our department was admitted to the surgical pathology confirmed clinical data complete report of 21 cases are as follows. 1 clinical data 1.1 a stock of information: 21 cases, 9 males and 12 females, aged 11 to 66 years, mean 36.5 years. Course of 2 months to 8 years, an average of 1.5 years. All unilateral disease,