Besides, the primary tumor might extend to the nasalfossa (5 cases), paranasal sinuses and the base of the skull (5 cases).
此外，原发瘤可以扩展到鼻腔(5例)，副鼻窦和颅底(5例)。
2
Methods To puncture from inferior nasal meatus and canine fossa with a nasal endoscopic needle, then, to cut away the pathological tissue of maxillary sinus under the endoscopic observation.
方法：鼻窦镜穿刺套管针分别从下鼻道、尖牙窝穿刺，在鼻内窥镜直视下切除上颌窦病变；
3
Contrast clearly demonstrates the extent of the lesion within the nasal cavity and invasion of the ethmoidal sinus and anterior cranial fossa (red arrow in Figure 4).