出血坏死性上颌窦炎在临床上易被误诊为上颌窦肿瘤,X线、CT检查对观察病变范围和鉴别诊断上有重要价值[1-3]。X线、CT检查主要以窦腔内软组织肿块、窦壁骨质吸收或破坏为特征,而一般上颌窦多以窦腔致密、有液平及黏膜增厚、窦壁改变不多见为特征。慢性期可表现为窦壁的增生硬化 Hemorrhagic necrotizing maxillary sinusitis is clinically misdiagnosed as maxillary sinus tumors, X-ray, CT examination of the scope of the observation of lesions and differential diagnosis of great value [1-3]. X-ray, CT examination is mainly characterized by soft tissue mass in the sinus cavity, bone absorption or destruction of the sinus wall, while the general maxillary sinus sinus dense, with the level and mucosal thickening, sinus wall changes are rare. Chronic phase can be expressed as sinus wall proliferation and sclerosis