While the deglutitional muscles, medial pterygoid muscles, Rosenmuller fossa and parapharyngeal space were obliterated or thickening in some of the cases after treatment.

• 位于吞嚥肌、翼状肌、鼻咽洛氏隐窝和鼻咽旁空腔地区的肿瘤，治疗后少部份尚有肥厚不清的现象，可能是残馀肿瘤或其他反应。