副鼻窦的原发恶性肿瘤在临床上并不少见,多数病变起源于上颌窦,筛窦和蝶窦的恶性肿瘤相对少见,常规X线平片和断层仅能显示窦腔的均匀高密度影和较明显的骨壁破坏。CT不仅能显示副鼻窦内的软组织肿块,各窦壁的骨质破坏程度及病变向颞下窝、翼腭窝、 Primary malignancies of the paranasal sinuses are not uncommon in the clinic. Most lesions originate in the maxillary sinus, the ethmoid sinus, and the sphenoid sinus are relatively rare. Conventional X-rays and faults can only show uniform high-density sinusoids. Obvious bone wall destruction. CT can not only show the soft tissue mass in the paranasal sinuses, but also the degree of bone destruction of each sinus wall and the lesion to the infratemporal fossa, pterygopalatine fossa,