1临床资料患者,男,21岁,主诉左面颊部不适半年。查体:左面颊无明显隆起,唇齿龈无隆起,左鼻底膨隆明显(图1A),左侧切牙、尖牙有残根,曲面断层不排除根尖囊肿的可能。鼻窦CT示左上颌骨腭突巨大囊肿,边界清晰,囊腔密度不均,突入左上颌窦腔约2/3,与左上颌窦未连通,腭 1 clinical data patients, male, 21 years old, complained of left cheek discomfort for six months. Physical examination: no obvious uplift left cheek, lip gingival without bulging, obvious swelling of the left nasal end (Figure 1A), the left incisor, canine residual roots, curved surface incision does not rule out the possibility of apical cysts. Sinus CT showed the left maxillary palatal gigantic cyst, clear boundary, uneven cyst density, into the left maxillary sinus cavity about 2/3, not connected with the left maxillary sinus, palate