大约四分之一的病人在鼻内窥镜鼻腔检查时可在上颌窦后囟门发现副口。 CT检查发现副口并非罕见。分泌物可从副口排出 ,也可通过副口进入上颌窦 ,然后再从自然口排出。已有两篇报道鼻内窥镜发现上颌窦副口与自然口间分泌物循环。CT所见粘液循环则很少见。报告 1例鼻窦冠状位 CT Approximately one quarter of patients in the nasal endoscopy nasal examination can be found in the maxillary sinus fontanel. CT examination found that the secondary port is not uncommon. Secretions can be discharged from the Vice port, but also through the mouth into the maxillary sinus, and then discharged from the natural mouth. There have been two reports of nasal endoscopy found maxillary sinus mouth and natural mouth secretions circulation. CT see the mucus cycle is rare. Report of 1 cases of sinus coronal CT