上颌窦良性肿瘤和瘤样病变可出现与恶性肿瘤类似的临床症状而造成诊断和治疗上的困难。我院1961～1985年共发现5例疑难病例,兹分析於下。 1.病例资科例1:男性,69岁,右侧鼻塞伴出血及局部胀痛。检查:右总鼻道狭窄,下鼻甲向内移位,后鼻孔有灰白色组织堵塞。X线照片:右上颌窦密度增高及内侧壁骨质破坏。术中见肿物质脆,易出血, The benign tumors and tumor-like lesions of the maxillary sinus can present clinical symptoms similar to those of malignant tumors and cause difficulties in diagnosis and treatment. A total of 5 difficult cases were found in our hospital from 1961 to 1985. 1. Case Study Case 1: Male, 69 years old, with right side nasal congestion with bleeding and local pain. Examination: The total right nasal passage is narrow, the inferior turbinate is displaced inwards, and the rear naris is covered with grayish tissue. X-ray pictures: increased density of the right maxillary sinus and bone destruction of the inner wall. During the operation, the material was found to be brittle and easy to bleed.