颞下、翼腭和咽旁间隙是口腔颌面部的深在间隙。位于这些间隙的肿瘤在临床上不易发现。CT问世以前,其检查常依赖于一般X线摄片。由于不能显示软组织影象,诊断常感困难。CT具有显示软组织和三维空间结构的优点,可清楚地显示肿瘤的范围及其与周围组织 Temporomandibular, pterygopalatine and parapharyngeal space is the depth of the oral maxillofacial region in the gap. Tumors located in these gaps are not clinically obvious. Before the advent of CT, its examination often depends on the general X-ray. Diagnosis can often be difficult because it can not display soft tissue images. CT shows the advantages of soft tissue and three-dimensional structure, can clearly show the scope of the tumor and its surrounding tissue