上颌窦粘液囊肿系因上颌窦自然开口受阻、窦内分泌物潴留所致。其发病牢较低,据统计,单纯上颌窦粘液囊肿仅占鼻窦牯液囊肿的3～10%。现将我科收治的5例报告如下。5例均诊断明确,并经手术证实,其中男4例,女1例,年龄17～58岁,平均40.8岁。主要临床表现为:面颊肿胀或膨隆4例,前庭乒乓球感3例, Maxillary sinus mucosal cyst due to the natural opening of the maxillary sinus obstruction, caused by retention of sinus secretions. The incidence of prison is low, according to statistics, simple maxillary sinus mucoceles accounted for only sinus cyst 3 to 10%. Now we receive 5 cases reported as follows. 5 cases were diagnosed, and confirmed by surgery, including 4 males and 1 female, aged 17 to 58 years, mean 40.8 years. The main clinical manifestations were: swollen or bulging cheeks in 4 cases, 3 cases of vestibular pingpong feeling,