上颌窦黏液囊肿的CT诊断

分析经手术和病理证实的 36例上颌窦黏液囊肿的CT征象。结果 :低密度者 2 0例 ,等、高密度者 16例 ;形态上结节型 2 1例、炎症型 8例、窦壁缺损型 7例。病灶呈囊性密度时 ,诊断较容易 ;病灶呈软组织密度时 ,结节型需与息肉鉴别 ,炎症型需与上颌窦炎区别 ,窦壁缺损型易与上颌窦良恶性肿瘤混淆。岛屿征及骨质硬化具有较大的鉴别诊断意义

CT diagnosis of maxillary mucoceles

CT signs of thirty-six cases of maxillary mucocele surgically and pathologically proved were analyzed. 20 of 36 cases revealed as low density lesion. 16 of 36 cases revealed as isodensity or high density lesion. They were morphologically classified as three types: nodular type, inflammatory type, bony defect type. Cystic morphology and fluid density within the lesion obviously indicated mucocele. Differential diagnosis should be made between mucocele and polyps, when the lesion revealed as soft tissue density. Inflammatory type need to be distinguished from maxillary inflammation. And bony defect type should be distinguished from the benign or malignant tumor of maxillary sinus. The islet sign and bone sclerosis are considered to be valuable for the differential diagnosis.